diff --git a/lang/en/plugin.php b/lang/en/plugin.php
index 7b62babd8bd2c..6b062117a61c7 100644
--- a/lang/en/plugin.php
+++ b/lang/en/plugin.php
@@ -50,6 +50,7 @@
 $string['sourceext'] = 'Extension';
 $string['sourcestd'] = 'Standard';
 $string['status'] = 'Status';
+$string['status_delete'] = 'To be deleted';
 $string['status_downgrade'] = 'Higher version already installed!';
 $string['status_missing'] = 'Missing from disk!';
 $string['status_new'] = 'To be installed';
diff --git a/lib/pluginlib.php b/lib/pluginlib.php
index e0c22716dcca3..6ed56d3e6192f 100644
--- a/lib/pluginlib.php
+++ b/lib/pluginlib.php
@@ -47,6 +47,8 @@ class plugin_manager {
     const PLUGIN_STATUS_NEW         = 'new';
     /** the plugin is about to be upgraded */
     const PLUGIN_STATUS_UPGRADE     = 'upgrade';
+    /** the standard plugin is about to be deleted */
+    const PLUGIN_STATUS_DELETE     = 'delete';
     /** the version at the disk is lower than the one already installed */
     const PLUGIN_STATUS_DOWNGRADE   = 'downgrade';
     /** the plugin is installed but missing from disk */
@@ -289,9 +291,32 @@ public function all_plugins_ok($moodleversion) {
         return true;
     }
 
+    /**
+     * Defines a list of all plugins that were originally shipped in the standard Moodle distribution,
+     * but are not anymore and are deleted during upgrades.
+     *
+     * The main purpose of this list is to hide missing plugins during upgrade.
+     *
+     * @param string $type plugin type
+     * @param string $name plugin name
+     * @return bool
+     */
+    public static function is_deleted_standard_plugin($type, $name) {
+        static $plugins = array(
+            'block' => array('admin', 'admin_tree', 'loancalc', 'search'),
+            'filter' => array('mod_data', 'mod_glossary'),
+        );
+
+        if (!isset($plugins[$type])) {
+            return false;
+        }
+        return in_array($name, $plugins[$type]);
+    }
+
     /**
      * Defines a white list of all plugins shipped in the standard Moodle distribution
      *
+     * @param string $type
      * @return false|array array of standard plugins or false if the type is unknown
      */
     public static function standard_plugins_list($type) {
@@ -809,6 +834,9 @@ public function init_is_standard() {
             $standard = array_flip($standard);
             if (isset($standard[$this->name])) {
                 $this->source = plugin_manager::PLUGIN_SOURCE_STANDARD;
+            } else if (!is_null($this->versiondb) and is_null($this->versiondisk)
+                    and plugin_manager::is_deleted_standard_plugin($this->type, $this->name)) {
+                $this->source = plugin_manager::PLUGIN_SOURCE_STANDARD; // to be deleted
             } else {
                 $this->source = plugin_manager::PLUGIN_SOURCE_EXTENSION;
             }
@@ -834,7 +862,11 @@ public function get_status() {
             return plugin_manager::PLUGIN_STATUS_NEW;
 
         } else if (!is_null($this->versiondb) and is_null($this->versiondisk)) {
-            return plugin_manager::PLUGIN_STATUS_MISSING;
+            if (plugin_manager::is_deleted_standard_plugin($this->type, $this->name)) {
+                return plugin_manager::PLUGIN_STATUS_DELETE;
+            } else {
+                return plugin_manager::PLUGIN_STATUS_MISSING;
+            }
 
         } else if ((string)$this->versiondb === (string)$this->versiondisk) {
             return plugin_manager::PLUGIN_STATUS_UPTODATE;
diff --git a/theme/base/style/admin.css b/theme/base/style/admin.css
index f90af47238b31..64017d4360e43 100644
--- a/theme/base/style/admin.css
+++ b/theme/base/style/admin.css
@@ -190,6 +190,7 @@
 #page-admin-index #plugins-check .status-missing .status {background-color:#ffd3d9;}
 #page-admin-index #plugins-check .status-new .status {background-color:#e7f1c3;}
 #page-admin-index #plugins-check .status-nodb .status {color:#999;}
+#page-admin-index #plugins-check .status-delete .status {background-color:#d2ebff;}
 #page-admin-index #plugins-check .status-upgrade .status {background-color:#d2ebff;}
 #page-admin-index #plugins-check .status-uptodate .status {color:#999;}
 #page-admin-index #plugins-check .requires ul {font-size:0.7em;margin:0;}