diff --git a/apps/dav/lib/CardDAV/CardDavBackend.php b/apps/dav/lib/CardDAV/CardDavBackend.php
index f887e3b32b755..76540de857d5c 100644
--- a/apps/dav/lib/CardDAV/CardDavBackend.php
+++ b/apps/dav/lib/CardDAV/CardDavBackend.php
@@ -1053,6 +1053,13 @@ public function updateShares(IShareable $shareable, array $add, array $remove):
 		}, $this->db);
 	}
 
+	/**
+	 * Delete all of a user's shares
+	 */
+	public function deleteAllSharesByUser(string $principaluri): void {
+		$this->sharingBackend->deleteAllSharesByUser($principaluri);
+	}
+
 	/**
 	 * Search contacts in a specific address-book
 	 *
diff --git a/apps/dav/lib/HookManager.php b/apps/dav/lib/HookManager.php
index 46cf9621f4774..d7e6f294e960f 100644
--- a/apps/dav/lib/HookManager.php
+++ b/apps/dav/lib/HookManager.php
@@ -141,6 +141,7 @@ public function postDeleteUser($params) {
 			);
 		}
 		$this->calDav->deleteAllSharesByUser('principals/users/' . $uid);
+		$this->cardDav->deleteAllSharesByUser('principals/users/' . $uid);
 
 		foreach ($this->addressBooksToDelete as $addressBook) {
 			$this->cardDav->deleteAddressBook($addressBook['id']);