diff --git a/CHANGELOG.md b/CHANGELOG.md
index 63860eccf3..940741a549 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,7 @@
 - Fixed a bug where address changes weren’t being synced to carts using them as a source. ([#3178](https://github.com/craftcms/commerce/issues/3178))
 - Added `craft\commerce\services\Orders::afterSaveAddressHandler()`.
 - Added `craft\commerce\elements\Order::$orderCompletedEmail`. ([#3138](https://github.com/craftcms/commerce/issues/3138))
+- Added the `commerce/cart/forget-cart` action. ([#3206](https://github.com/craftcms/commerce/issues/3206))
 
 ## 4.2.11 - 2023-06-05
 
diff --git a/src/controllers/CartController.php b/src/controllers/CartController.php
index 3754a074a7..aad1586e95 100644
--- a/src/controllers/CartController.php
+++ b/src/controllers/CartController.php
@@ -277,6 +277,20 @@ public function actionUpdateCart(): ?Response
         return $this->_returnCart();
     }
 
+    /**
+     * @return Response|null
+     * @throws BadRequestHttpException
+     * @throws InvalidConfigException
+     * @since 4.3
+     */
+    public function actionForgetCart(): ?Response
+    {
+        $this->requirePostRequest();
+        Plugin::getInstance()->getCarts()->forgetCart();
+        $this->setSuccessFlash(Craft::t('commerce', 'Cart forgotten.'));
+        return $this->redirectToPostedUrl();
+    }
+
     /**
      * @throws BadRequestHttpException
      * @throws Exception