diff --git a/packages/core/src/browser/quick-open/quick-open-model.ts b/packages/core/src/browser/quick-open/quick-open-model.ts
index 7b66e1046d456..716a8d7d34bd0 100644
--- a/packages/core/src/browser/quick-open/quick-open-model.ts
+++ b/packages/core/src/browser/quick-open/quick-open-model.ts
@@ -29,6 +29,12 @@ export enum QuickOpenMode {
     OPEN_IN_BACKGROUND
 }
 
+export enum HideReason {
+    ELEMENT_SELECTED,
+    FOCUS_LOST,
+    CANCELED,
+}
+
 export interface QuickOpenItemOptions {
     tooltip?: string;
     label?: string;
diff --git a/packages/core/src/browser/quick-open/quick-open-service.ts b/packages/core/src/browser/quick-open/quick-open-service.ts
index 61f68b2928e44..d2700fefd35b5 100644
--- a/packages/core/src/browser/quick-open/quick-open-service.ts
+++ b/packages/core/src/browser/quick-open/quick-open-service.ts
@@ -15,7 +15,7 @@
  ********************************************************************************/
 
 import { injectable } from 'inversify';
-import { QuickOpenModel } from './quick-open-model';
+import { QuickOpenModel, HideReason } from './quick-open-model';
 import { MessageType } from '../../common/message-service-protocol';
 
 export type QuickOpenOptions = Partial<QuickOpenOptions.Resolved>;
@@ -84,6 +84,7 @@ export class QuickOpenService {
      * It should be implemented by an extension, e.g. by the monaco extension.
      */
     open(model: QuickOpenModel, options?: QuickOpenOptions): void { }
+    hide(reason?: HideReason): void { }
     showDecoration(type: MessageType): void { }
     hideDecoration(): void { }
 }
diff --git a/packages/core/src/browser/quick-open/quick-pick-service-impl.ts b/packages/core/src/browser/quick-open/quick-pick-service-impl.ts
index de4f8ea87c32c..0f787ca679a22 100644
--- a/packages/core/src/browser/quick-open/quick-pick-service-impl.ts
+++ b/packages/core/src/browser/quick-open/quick-pick-service-impl.ts
@@ -15,7 +15,7 @@
  ********************************************************************************/
 
 import { injectable, inject } from 'inversify';
-import { QuickOpenItem, QuickOpenMode, QuickOpenGroupItem, QuickOpenItemOptions } from './quick-open-model';
+import { QuickOpenItem, QuickOpenMode, QuickOpenGroupItem, QuickOpenItemOptions, HideReason } from './quick-open-model';
 import { QuickOpenService } from './quick-open-service';
 import { QuickPickService, QuickPickOptions, QuickPickItem, QuickPickSeparator, QuickPickValue } from '../../common/quick-pick-service';
 
@@ -84,4 +84,8 @@ export class QuickPickServiceImpl implements QuickPickService {
         };
     }
 
+    hide(reason?: HideReason): void {
+        this.quickOpenService.hide(reason);
+    }
+
 }
diff --git a/packages/core/src/common/quick-pick-service.ts b/packages/core/src/common/quick-pick-service.ts
index dbbdcf1b7af7c..1ea74bcfd4765 100644
--- a/packages/core/src/common/quick-pick-service.ts
+++ b/packages/core/src/common/quick-pick-service.ts
@@ -14,6 +14,8 @@
  * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
  ********************************************************************************/
 
+import { HideReason } from '../browser';
+
 export type QuickPickItem<T> = QuickPickValue<T> | QuickPickSeparator;
 
 export interface QuickPickSeparator {
@@ -54,4 +56,6 @@ export interface QuickPickService {
 
     show<T>(elements: QuickPickItem<T>[], options?: QuickPickOptions): Promise<T | undefined>;
 
+    hide(reason?: HideReason): void
+
 }
diff --git a/packages/monaco/src/browser/monaco-quick-open-service.ts b/packages/monaco/src/browser/monaco-quick-open-service.ts
index 554b65fdb31d4..83481da435a02 100644
--- a/packages/monaco/src/browser/monaco-quick-open-service.ts
+++ b/packages/monaco/src/browser/monaco-quick-open-service.ts
@@ -18,7 +18,7 @@ import { injectable, inject, postConstruct } from 'inversify';
 import { MessageType } from '@theia/core/lib/common/message-service-protocol';
 import {
     QuickOpenService, QuickOpenModel, QuickOpenOptions, QuickOpenItem, QuickOpenGroupItem,
-    QuickOpenMode, KeySequence, QuickOpenActionProvider, QuickOpenAction, ResolvedKeybinding,
+    QuickOpenMode, HideReason, KeySequence, QuickOpenActionProvider, QuickOpenAction, ResolvedKeybinding,
     KeyCode, Key, KeybindingRegistry
 } from '@theia/core/lib/browser';
 import { KEY_CODE_MAP } from './monaco-keycode-map';
@@ -71,6 +71,13 @@ export class MonacoQuickOpenService extends QuickOpenService {
         this.internalOpen(new MonacoQuickOpenControllerOptsImpl(model, this.keybindingRegistry, options));
     }
 
+    hide(reason?: HideReason): void {
+        const hideReason = reason === HideReason.ELEMENT_SELECTED ? monaco.quickOpen.HideReason.ELEMENT_SELECTED :
+            reason === HideReason.FOCUS_LOST ? monaco.quickOpen.HideReason.FOCUS_LOST :
+                monaco.quickOpen.HideReason.CANCELED;
+        this.widget.hide(reason ? hideReason : undefined);
+    }
+
     showDecoration(type: MessageType): void {
         let decoration = monaco.MarkerSeverity.Info;
         if (type === MessageType.Warning) {
diff --git a/packages/plugin-ext/src/api/plugin-api.ts b/packages/plugin-ext/src/api/plugin-api.ts
index cc3771e05d407..f8619c9e0ef81 100644
--- a/packages/plugin-ext/src/api/plugin-api.ts
+++ b/packages/plugin-ext/src/api/plugin-api.ts
@@ -267,6 +267,12 @@ export interface PickOpenItem {
     picked?: boolean;
 }
 
+export enum HideReason {
+    ELEMENT_SELECTED,
+    FOCUS_LOST,
+    CANCELED,
+}
+
 export enum MainMessageType {
     Error,
     Warning,
@@ -388,6 +394,7 @@ export interface QuickOpenMain {
     $setItems(items: PickOpenItem[]): Promise<any>;
     $setError(error: Error): Promise<any>;
     $input(options: theia.InputBoxOptions, validateInput: boolean): Promise<string | undefined>;
+    $hide(reason?: HideReason): void;
 }
 
 export interface WorkspaceMain {
diff --git a/packages/plugin-ext/src/main/browser/quick-open-main.ts b/packages/plugin-ext/src/main/browser/quick-open-main.ts
index e1f82a3e04ce1..79dd183cce7a0 100644
--- a/packages/plugin-ext/src/main/browser/quick-open-main.ts
+++ b/packages/plugin-ext/src/main/browser/quick-open-main.ts
@@ -16,7 +16,7 @@
 
 import { InputBoxOptions } from '@theia/plugin';
 import { interfaces } from 'inversify';
-import { QuickOpenModel, QuickOpenItem, QuickOpenMode } from '@theia/core/lib/browser/quick-open/quick-open-model';
+import { QuickOpenModel, QuickOpenItem, QuickOpenMode, HideReason } from '@theia/core/lib/browser/quick-open/quick-open-model';
 import { RPCProtocol } from '../../api/rpc-protocol';
 import { QuickOpenExt, QuickOpenMain, MAIN_RPC_CONTEXT, PickOptions, PickOpenItem } from '../../api/plugin-api';
 import { MonacoQuickOpenService } from '@theia/monaco/lib/browser/monaco-quick-open-service';
@@ -110,4 +110,8 @@ export class QuickOpenMainImpl implements QuickOpenMain, QuickOpenModel {
         }
     }
 
+    $hide(reason?: HideReason): void {
+        this.delegate.hide(reason);
+    }
+
 }
diff --git a/packages/plugin-ext/src/plugin/quick-open.ts b/packages/plugin-ext/src/plugin/quick-open.ts
index 21a7488733c13..094b9e00f216f 100644
--- a/packages/plugin-ext/src/plugin/quick-open.ts
+++ b/packages/plugin-ext/src/plugin/quick-open.ts
@@ -13,7 +13,7 @@
  *
  * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
  ********************************************************************************/
-import { QuickOpenExt, PLUGIN_RPC_CONTEXT as Ext, QuickOpenMain, PickOpenItem } from '../api/plugin-api';
+import { QuickOpenExt, PLUGIN_RPC_CONTEXT as Ext, QuickOpenMain, PickOpenItem, HideReason } from '../api/plugin-api';
 import { QuickPickOptions, QuickPickItem, InputBoxOptions } from '@theia/plugin';
 import { CancellationToken } from '@theia/core/lib/common/cancellation';
 import { RPCProtocol } from '../api/rpc-protocol';
@@ -129,8 +129,11 @@ export class QuickOpenExtImpl implements QuickOpenExt {
         return hookCancellationToken(token, promise);
     }
 
-}
+    hide(reason?: HideReason): void {
+        this.proxy.$hide(reason);
+    }
 
+}
 /**
  * Base implementation of {@link QuickPick} that uses {@link QuickOpenExt}.
  * Missing functionality is going to be implemented in the scope of https://github.com/theia-ide/theia/issues/5059
@@ -231,6 +234,7 @@ export class QuickPickExt<T extends QuickPickItem> implements QuickPick<T> {
     }
 
     hide(): void {
+        this.quickOpen.hide();
         this.dispose();
     }