diff --git a/UPGRADE.md b/UPGRADE.md
index 01020b90a9a..7d49322ca8e 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -1,3 +1,9 @@
+# Upgrade to 3.2
+
+## `orm:schema-tool:update` option `--complete` is deprecated
+
+That option behaves as a no-op, and is deprecated. It will be removed in 4.0.
+
 # Upgrade to 3.1
 
 ## Deprecate `Doctrine\ORM\Mapping\ReflectionEnumProperty`
diff --git a/src/Tools/Console/Command/SchemaTool/UpdateCommand.php b/src/Tools/Console/Command/SchemaTool/UpdateCommand.php
index 9d490b4cb59..f35fc384536 100644
--- a/src/Tools/Console/Command/SchemaTool/UpdateCommand.php
+++ b/src/Tools/Console/Command/SchemaTool/UpdateCommand.php
@@ -4,6 +4,7 @@
 
 namespace Doctrine\ORM\Tools\Console\Command\SchemaTool;
 
+use Doctrine\Deprecations\Deprecation;
 use Doctrine\ORM\Tools\SchemaTool;
 use Symfony\Component\Console\Input\InputInterface;
 use Symfony\Component\Console\Input\InputOption;
@@ -28,7 +29,7 @@ protected function configure(): void
         $this->setName($this->name)
              ->setDescription('Executes (or dumps) the SQL needed to update the database schema to match the current mapping metadata')
              ->addOption('em', null, InputOption::VALUE_REQUIRED, 'Name of the entity manager to operate on')
-             ->addOption('complete', null, InputOption::VALUE_NONE, 'This option is a no-op and will be removed in 4.0')
+             ->addOption('complete', null, InputOption::VALUE_NONE, 'This option is a no-op, is deprecated and will be removed in 4.0')
              ->addOption('dump-sql', null, InputOption::VALUE_NONE, 'Dumps the generated SQL statements to the screen (does not execute them).')
              ->addOption('force', 'f', InputOption::VALUE_NONE, 'Causes the generated SQL statements to be physically executed against your database.')
              ->setHelp(<<<'EOT'
@@ -75,6 +76,15 @@ protected function executeSchemaCommand(InputInterface $input, OutputInterface $
     {
         $notificationUi = $ui->getErrorStyle();
 
+        if ($input->getOption('complete') === true) {
+            Deprecation::trigger(
+                'doctrine/orm',
+                'https://github.com/doctrine/orm/pull/11354',
+                'The --complete option is a no-op, is deprecated and will be removed in Doctrine ORM 4.0.',
+            );
+            $notificationUi->warning('The --complete option is a no-op, is deprecated and will be removed in Doctrine ORM 4.0.');
+        }
+
         $sqls = $schemaTool->getUpdateSchemaSql($metadatas);
 
         if (empty($sqls)) {