diff --git a/UPGRADE.md b/UPGRADE.md
index a0e21d83d8d..e51562bd0ab 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -8,6 +8,11 @@ awareness about deprecated code.
 
 # Upgrade to 3.2
 
+## Deprecated `SQLLogger` and its implementations.
+
+The `SQLLogger` and its implementations `DebugStack` and `LoggerChain` have been deprecated.
+For logging purposes, use `Doctrine\DBAL\Logging\Middleware` instead. No replacement for `DebugStack` is provided.
+
 ## Deprecated `SqliteSchemaManager::createDatabase()` and `dropDatabase()` methods.
 
 The `SqliteSchemaManager::createDatabase()` and `dropDatabase()` methods have been deprecated. The SQLite engine
diff --git a/psalm.xml.dist b/psalm.xml.dist
index eb1afaf6ba6..4b194dda9f3 100644
--- a/psalm.xml.dist
+++ b/psalm.xml.dist
@@ -67,6 +67,13 @@
                     TODO: remove in 4.0.0
                 -->
                 <referencedClass name="Doctrine\DBAL\Schema\Constraint"/>
+                <!--
+                    TODO: remove in 4.0.0
+                    See https://github.com/doctrine/dbal/pull/4967
+                -->
+                <referencedClass name="Doctrine\DBAL\Logging\DebugStack"/>
+                <referencedClass name="Doctrine\DBAL\Logging\SQLLogger"/>
+                <referencedClass name="Doctrine\DBAL\Logging\LoggerChain"/>
             </errorLevel>
         </DeprecatedClass>
         <DeprecatedInterface>
@@ -80,6 +87,11 @@
                     TODO: remove in 4.0.0
                 -->
                 <referencedClass name="Doctrine\DBAL\Schema\Constraint"/>
+                <!--
+                    TODO: remove in 4.0.0
+                    See https://github.com/doctrine/dbal/pull/4967
+                -->
+                <referencedClass name="Doctrine\DBAL\Logging\SQLLogger"/>
             </errorLevel>
         </DeprecatedInterface>
         <DeprecatedMethod>
diff --git a/src/Logging/DebugStack.php b/src/Logging/DebugStack.php
index 6a9fab5a9e4..24a2d68cfbe 100644
--- a/src/Logging/DebugStack.php
+++ b/src/Logging/DebugStack.php
@@ -2,10 +2,14 @@
 
 namespace Doctrine\DBAL\Logging;
 
+use Doctrine\Deprecations\Deprecation;
+
 use function microtime;
 
 /**
  * Includes executed SQLs in a Debug Stack.
+ *
+ * @deprecated
  */
 class DebugStack implements SQLLogger
 {
@@ -29,6 +33,15 @@ class DebugStack implements SQLLogger
     /** @var int */
     public $currentQuery = 0;
 
+    public function __construct()
+    {
+        Deprecation::trigger(
+            'doctrine/dbal',
+            'https://github.com/doctrine/dbal/pull/4967',
+            'DebugStack is deprecated.'
+        );
+    }
+
     /**
      * {@inheritdoc}
      */
diff --git a/src/Logging/LoggerChain.php b/src/Logging/LoggerChain.php
index 9b44dc0e3e8..c256dd72cd6 100644
--- a/src/Logging/LoggerChain.php
+++ b/src/Logging/LoggerChain.php
@@ -2,8 +2,12 @@
 
 namespace Doctrine\DBAL\Logging;
 
+use Doctrine\Deprecations\Deprecation;
+
 /**
  * Chains multiple SQLLogger.
+ *
+ * @deprecated
  */
 class LoggerChain implements SQLLogger
 {
@@ -15,6 +19,12 @@ class LoggerChain implements SQLLogger
      */
     public function __construct(iterable $loggers = [])
     {
+        Deprecation::trigger(
+            'doctrine/dbal',
+            'https://github.com/doctrine/dbal/pull/4967',
+            'LoggerChain is deprecated'
+        );
+
         $this->loggers = $loggers;
     }
 
diff --git a/src/Logging/SQLLogger.php b/src/Logging/SQLLogger.php
index a0bdf1bf6a8..40eb707addd 100644
--- a/src/Logging/SQLLogger.php
+++ b/src/Logging/SQLLogger.php
@@ -6,6 +6,9 @@
 
 /**
  * Interface for SQL loggers.
+ *
+ * @deprecated Use {@link \Doctrine\DBAL\Logging\Middleware} or implement
+ *            {@link \Doctrine\DBAL\Driver\Middleware} instead.
  */
 interface SQLLogger
 {