diff --git a/packages/strapi-plugin-content-manager/admin/src/components/SelectMany/index.js b/packages/strapi-plugin-content-manager/admin/src/components/SelectMany/index.js
index 09bdbc430f..32f6ce0ce1 100644
--- a/packages/strapi-plugin-content-manager/admin/src/components/SelectMany/index.js
+++ b/packages/strapi-plugin-content-manager/admin/src/components/SelectMany/index.js
@@ -18,6 +18,7 @@ function SelectMany({
   move,
   onInputChange,
   onMenuClose,
+  onMenuOpen,
   onMenuScrollToBottom,
   onRemove,
   options,
@@ -84,6 +85,7 @@ function SelectMany({
         onChange={addRelation}
         onInputChange={onInputChange}
         onMenuClose={onMenuClose}
+        onMenuOpen={onMenuOpen}
         onMenuScrollToBottom={onMenuScrollToBottom}
         placeholder={placeholder}
         styles={styles}
@@ -140,6 +142,7 @@ SelectMany.propTypes = {
   name: PropTypes.string.isRequired,
   onInputChange: PropTypes.func.isRequired,
   onMenuClose: PropTypes.func.isRequired,
+  onMenuOpen: PropTypes.func.isRequired,
   onMenuScrollToBottom: PropTypes.func.isRequired,
   onRemove: PropTypes.func.isRequired,
   options: PropTypes.array.isRequired,
diff --git a/packages/strapi-plugin-content-manager/admin/src/components/SelectOne/index.js b/packages/strapi-plugin-content-manager/admin/src/components/SelectOne/index.js
index 0a3600cae8..e38687ae2d 100644
--- a/packages/strapi-plugin-content-manager/admin/src/components/SelectOne/index.js
+++ b/packages/strapi-plugin-content-manager/admin/src/components/SelectOne/index.js
@@ -13,6 +13,7 @@ function SelectOne({
   onChange,
   onInputChange,
   onMenuClose,
+  onMenuOpen,
   onMenuScrollToBottom,
   options,
   placeholder,
@@ -31,6 +32,7 @@ function SelectOne({
       onChange={onChange}
       onInputChange={onInputChange}
       onMenuClose={onMenuClose}
+      onMenuOpen={onMenuOpen}
       onMenuScrollToBottom={onMenuScrollToBottom}
       placeholder={placeholder}
       styles={styles}
@@ -58,6 +60,7 @@ SelectOne.propTypes = {
   onChange: PropTypes.func.isRequired,
   onInputChange: PropTypes.func.isRequired,
   onMenuClose: PropTypes.func.isRequired,
+  onMenuOpen: PropTypes.func.isRequired,
   onMenuScrollToBottom: PropTypes.func.isRequired,
   options: PropTypes.array.isRequired,
   placeholder: PropTypes.node.isRequired,
diff --git a/packages/strapi-plugin-content-manager/admin/src/components/SelectWrapper/index.js b/packages/strapi-plugin-content-manager/admin/src/components/SelectWrapper/index.js
index 69f555a6f3..02028fe4fd 100644
--- a/packages/strapi-plugin-content-manager/admin/src/components/SelectWrapper/index.js
+++ b/packages/strapi-plugin-content-manager/admin/src/components/SelectWrapper/index.js
@@ -17,6 +17,11 @@ import Option from './Option';
 import { A, BaselineAlignment } from './components';
 import { connect, select, styles } from './utils';
 
+const initialPaginationState = {
+  _contains: '',
+  _limit: 20,
+  _start: 0,
+};
 function SelectWrapper({
   description,
   editable,
@@ -34,17 +39,13 @@ function SelectWrapper({
   // Disable the input in case of a polymorphic relation
   const isMorph = useMemo(() => relationType.toLowerCase().includes('morph'), [relationType]);
   const { addRelation, modifiedData, moveRelation, onChange, onRemoveRelation } = useDataManager();
-
   const { pathname } = useLocation();
 
   const value = get(modifiedData, name, null);
-  const [state, setState] = useState({
-    _contains: '',
-    _limit: 20,
-    _start: 0,
-  });
+  const [state, setState] = useState(initialPaginationState);
   const [options, setOptions] = useState([]);
-  const [isLoading, setIsLoading] = useState(true);
+  const [isLoading, setIsLoading] = useState(false);
+  const [isOpen, setIsOpen] = useState(false);
 
   const filteredOptions = useMemo(() => {
     return options.filter(option => {
@@ -64,6 +65,22 @@ function SelectWrapper({
 
   const { endPoint, containsKey, defaultParams, shouldDisplayRelationLink } = queryInfos;
 
+  const isSingle = ['oneWay', 'oneToOne', 'manyToOne', 'oneToManyMorph', 'oneToOneMorph'].includes(
+    relationType
+  );
+
+  const idsToOmit = useMemo(() => {
+    if (!value) {
+      return [];
+    }
+
+    if (isSingle) {
+      return [value];
+    }
+
+    return value.map(val => val.id);
+  }, [isSingle, value]);
+
   const getData = useCallback(
     async signal => {
       // Currently polymorphic relations are not handled
@@ -79,14 +96,21 @@ function SelectWrapper({
         return;
       }
 
-      const params = { _limit: state._limit, _start: state._start, ...defaultParams };
+      setIsLoading(true);
+
+      const params = { _limit: state._limit, ...defaultParams };
 
       if (state._contains) {
         params[containsKey] = state._contains;
       }
 
       try {
-        const data = await request(endPoint, { method: 'GET', params, signal });
+        const data = await request(endPoint, {
+          method: 'POST',
+          params,
+          signal,
+          body: { idsToOmit },
+        });
 
         const formattedData = data.map(obj => {
           return { value: obj, label: obj[mainField.name] };
@@ -108,17 +132,16 @@ function SelectWrapper({
         // Silent
       }
     },
-
     [
-      containsKey,
-      defaultParams,
-      endPoint,
-      isFieldAllowed,
       isMorph,
-      mainField.name,
+      isFieldAllowed,
       state._limit,
-      state._start,
       state._contains,
+      defaultParams,
+      containsKey,
+      endPoint,
+      idsToOmit,
+      mainField.name,
     ]
   );
 
@@ -126,12 +149,14 @@ function SelectWrapper({
     const abortController = new AbortController();
     const { signal } = abortController;
 
-    getData(signal);
+    if (isOpen) {
+      getData(signal);
+    }
 
     return () => abortController.abort();
-  }, [getData]);
+  }, [getData, isOpen]);
 
-  const onInputChange = (inputValue, { action }) => {
+  const handleInputChange = (inputValue, { action }) => {
     if (action === 'input-change') {
       setState(prevState => {
         if (prevState._contains === inputValue) {
@@ -145,13 +170,26 @@ function SelectWrapper({
     return inputValue;
   };
 
-  const onMenuScrollToBottom = () => {
-    setState(prevState => ({ ...prevState, _start: prevState._start + 20 }));
+  const handleMenuScrollToBottom = () => {
+    setState(prevState => ({ ...prevState, _limit: prevState._limit + 20 }));
   };
 
-  const isSingle = ['oneWay', 'oneToOne', 'manyToOne', 'oneToManyMorph', 'oneToOneMorph'].includes(
-    relationType
-  );
+  const handleMenuClose = () => {
+    setState(initialPaginationState);
+    setIsOpen(false);
+  };
+
+  const handleChange = value => {
+    onChange({ target: { name, value: value ? value.value : value } });
+  };
+
+  const handleAddRelation = value => {
+    addRelation({ target: { name, value } });
+  };
+
+  const handleMenuOpen = () => {
+    setIsOpen(true);
+  };
 
   const to = `/plugins/${pluginId}/collectionType/${targetModel}/${value ? value.id : null}`;
 
@@ -218,9 +256,7 @@ function SelectWrapper({
         <BaselineAlignment />
 
         <Component
-          addRelation={value => {
-            addRelation({ target: { name, value } });
-          }}
+          addRelation={handleAddRelation}
           components={{ ClearIndicator, DropdownIndicator, IndicatorSeparator, Option }}
           displayNavigationLink={shouldDisplayRelationLink}
           id={name}
@@ -231,14 +267,11 @@ function SelectWrapper({
           move={moveRelation}
           name={name}
           options={filteredOptions}
-          onChange={value => {
-            onChange({ target: { name, value: value ? value.value : value } });
-          }}
-          onInputChange={onInputChange}
-          onMenuClose={() => {
-            setState(prevState => ({ ...prevState, _contains: '' }));
-          }}
-          onMenuScrollToBottom={onMenuScrollToBottom}
+          onChange={handleChange}
+          onInputChange={handleInputChange}
+          onMenuClose={handleMenuClose}
+          onMenuOpen={handleMenuOpen}
+          onMenuScrollToBottom={handleMenuScrollToBottom}
           onRemove={onRemoveRelation}
           placeholder={
             isEmpty(placeholder) ? (
diff --git a/packages/strapi-plugin-content-manager/config/routes.json b/packages/strapi-plugin-content-manager/config/routes.json
index e4fa0ef15e..0bbad348f6 100644
--- a/packages/strapi-plugin-content-manager/config/routes.json
+++ b/packages/strapi-plugin-content-manager/config/routes.json
@@ -67,7 +67,7 @@
       }
     },
     {
-      "method": "GET",
+      "method": "POST",
       "path": "/relations/:model/:targetField",
       "handler": "relations.find",
       "config": {
diff --git a/packages/strapi-plugin-content-manager/controllers/__tests__/relations.test.js b/packages/strapi-plugin-content-manager/controllers/__tests__/relations.test.js
index 24b9e51292..5a52d858fd 100644
--- a/packages/strapi-plugin-content-manager/controllers/__tests__/relations.test.js
+++ b/packages/strapi-plugin-content-manager/controllers/__tests__/relations.test.js
@@ -158,5 +158,74 @@ describe('Relations', () => {
         },
       ]);
     });
+
+    test('Omit somes ids', async () => {
+      const result = [
+        {
+          id: 1,
+          title: 'title1',
+          secret: 'some secret',
+        },
+        {
+          id: 2,
+          title: 'title2',
+          secret: 'some secret 2',
+        },
+      ];
+      const configuration = {
+        metadatas: {
+          target: {
+            edit: {
+              mainField: 'title',
+            },
+          },
+        },
+      };
+      const assocModel = { uid: 'application::test.test', primaryKey: 'id', attributes: {} };
+      const notFound = jest.fn();
+      const find = jest.fn(() => Promise.resolve(result));
+      const findConfiguration = jest.fn(() => Promise.resolve(configuration));
+      const getModelByAssoc = jest.fn(() => assocModel);
+      const getModel = jest.fn(() => ({ attributes: { target: { model: 'test' } } }));
+
+      global.strapi = {
+        db: {
+          getModel,
+          getModelByAssoc,
+        },
+        plugins: {
+          'content-manager': {
+            services: {
+              'content-types': { findConfiguration },
+              'entity-manager': { find },
+            },
+          },
+        },
+      };
+
+      const ctx = createContext(
+        {
+          params: { model: 'test', targetField: 'target' },
+          body: { idsToOmit: [3, 4] },
+        },
+        {
+          notFound,
+        }
+      );
+
+      await relations.find(ctx);
+
+      expect(find).toHaveBeenCalledWith({ _where: { id_nin: [3, 4] } }, assocModel.uid);
+      expect(ctx.body).toEqual([
+        {
+          id: 1,
+          title: 'title1',
+        },
+        {
+          id: 2,
+          title: 'title2',
+        },
+      ]);
+    });
   });
 });
diff --git a/packages/strapi-plugin-content-manager/controllers/relations.js b/packages/strapi-plugin-content-manager/controllers/relations.js
index 0b12acd06f..6161f58d8c 100644
--- a/packages/strapi-plugin-content-manager/controllers/relations.js
+++ b/packages/strapi-plugin-content-manager/controllers/relations.js
@@ -1,6 +1,6 @@
 'use strict';
 
-const { has, prop, pick } = require('lodash/fp');
+const { has, prop, pick, concat } = require('lodash/fp');
 const { PUBLISHED_AT_ATTRIBUTE } = require('strapi-utils').contentTypes.constants;
 
 const { getService } = require('../utils');
@@ -9,6 +9,7 @@ module.exports = {
   async find(ctx) {
     const { model, targetField } = ctx.params;
     const { _component, ...query } = ctx.request.query;
+    const { idsToOmit } = ctx.request.body;
 
     if (!targetField) {
       return ctx.badRequest();
@@ -31,6 +32,11 @@ module.exports = {
       return ctx.notFound('target.notFound');
     }
 
+    if (idsToOmit && Array.isArray(idsToOmit)) {
+      query._where = query._where || {};
+      query._where.id_nin = concat(query._where.id_nin || [], idsToOmit);
+    }
+
     const entityManager = getService('entity-manager');
 
     let entities = [];
diff --git a/packages/strapi-plugin-content-manager/oas.yml b/packages/strapi-plugin-content-manager/oas.yml
index 337356b7aa..f4a4d453b7 100644
--- a/packages/strapi-plugin-content-manager/oas.yml
+++ b/packages/strapi-plugin-content-manager/oas.yml
@@ -210,7 +210,7 @@ paths:
                     description: Suggestion if request value is not available
   # Relationships
   /content-manager/relations/{model}/{targetField}:
-    get:
+    post:
       tags:
         - Relational fields
       description: Fetch list of possible related content
@@ -221,12 +221,22 @@ paths:
           schema:
             type: string
           required: true
-          description: name of the field in the model that holds the relation
+          description: Name of the field in the model that holds the relation
         - in: query
           name: _component
           schema:
             type: string
           description: Component uid if the targetField is in a component
+      requestBody:
+        content:
+          application/json:
+            schema:
+              type: object
+              properties:
+                idsToOmit:
+                  type: array
+                  items:
+                    $ref: '#/components/schemas/id'
       responses:
         200:
           description: Returns a list of sanitized entries based of the relational attribute info
@@ -245,7 +255,7 @@ paths:
                         - type: integer
                     '[mainField]':
                       type: string
-                      description: value of the mainField of the entry
+                      description: Value of the mainField of the entry
                     published_at:
                       type: date
   # Collection type
diff --git a/packages/strapi-plugin-content-manager/tests/relation-list.test.e2e.js b/packages/strapi-plugin-content-manager/tests/relation-list.test.e2e.js
index 450a823aec..532b780e5a 100644
--- a/packages/strapi-plugin-content-manager/tests/relation-list.test.e2e.js
+++ b/packages/strapi-plugin-content-manager/tests/relation-list.test.e2e.js
@@ -110,7 +110,7 @@ describe('Relation-list route', () => {
 
     test('Can get relation-list for products of a shop', async () => {
       const res = await rq({
-        method: 'GET',
+        method: 'POST',
         url: '/content-manager/relations/application::shop.shop/products',
       });
 
@@ -119,6 +119,19 @@ describe('Relation-list route', () => {
         expect(res.body[index]).toStrictEqual(pick(['_id', 'id', 'name'], product));
       });
     });
+
+    test('Can get relation-list for products of a shop and omit some results', async () => {
+      const res = await rq({
+        method: 'POST',
+        url: '/content-manager/relations/application::shop.shop/products',
+        body: {
+          idsToOmit: [data.products[0].id],
+        },
+      });
+
+      expect(res.body).toHaveLength(1);
+      expect(res.body[0]).toStrictEqual(pick(['_id', 'id', 'name'], data.products[1]));
+    });
   });
 
   describe('with draftAndPublish', () => {
@@ -145,7 +158,7 @@ describe('Relation-list route', () => {
 
     test('Can get relation-list for products of a shop', async () => {
       const res = await rq({
-        method: 'GET',
+        method: 'POST',
         url: '/content-manager/relations/application::shop.shop/products',
       });
 
@@ -161,5 +174,18 @@ describe('Relation-list route', () => {
         published_at: null,
       });
     });
+
+    test('Can get relation-list for products of a shop and omit some results', async () => {
+      const res = await rq({
+        method: 'POST',
+        url: '/content-manager/relations/application::shop.shop/products',
+        body: {
+          idsToOmit: [data.products[1].id],
+        },
+      });
+
+      expect(res.body).toHaveLength(1);
+      expect(res.body[0]).toMatchObject(pick(['_id', 'id', 'name'], data.products[0]));
+    });
   });
 });