diff --git a/app/app/Jobs/Supplier/DeleteSupplierProjectJob.php b/app/app/Jobs/Supplier/DeleteSupplierProjectJob.php
new file mode 100644
index 00000000..4652738f
--- /dev/null
+++ b/app/app/Jobs/Supplier/DeleteSupplierProjectJob.php
@@ -0,0 +1,80 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Jobs\Supplier;
+
+use App\Models\SupplierProject;
+use App\Services\Supplier\SupplierPortalClient;
+use Illuminate\Bus\Queueable;
+use Illuminate\Contracts\Queue\ShouldQueue;
+use Illuminate\Foundation\Bus\Dispatchable;
+use Illuminate\Queue\InteractsWithQueue;
+use Illuminate\Queue\SerializesModels;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Log;
+use Throwable;
+
+/**
+ * Удаление/пере-синк доноров у поставщика после удаления Лидерра-проекта.
+ *
+ * Для каждого supplier_project S (донора), к которому был привязан удалённый проект:
+ *   - остались другие потребители (project_supplier_links) → донор нужен другим клиентам:
+ *     НЕ удаляем у поставщика, пере-синкаем агрегат (SyncSupplierProjectsJob).
+ *   - потребителей не осталось → удаляем у поставщика (deleteProject) + локальную запись S.
+ *
+ * Spec: docs/superpowers/specs/2026-05-21-project-delete-dedup-errors-design.md §Решение 2.
+ */
+class DeleteSupplierProjectJob implements ShouldQueue
+{
+    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;
+
+    public int $tries = 3;
+
+    public int $backoff = 60;
+
+    public const string DB_CONNECTION = 'pgsql_supplier';
+
+    /** @param array<int,int> $supplierProjectIds */
+    public function __construct(public array $supplierProjectIds) {}
+
+    public function handle(SupplierPortalClient $client): void
+    {
+        $needsResync = false;
+
+        foreach ($this->supplierProjectIds as $id) {
+            $sp = SupplierProject::on(self::DB_CONNECTION)->find($id);
+            if ($sp === null) {
+                continue;
+            }
+
+            $remaining = DB::connection(self::DB_CONNECTION)
+                ->table('project_supplier_links')
+                ->where('supplier_project_id', $id)
+                ->count();
+
+            if ($remaining > 0) {
+                $needsResync = true;
+
+                continue;
+            }
+
+            if ($sp->supplier_external_id !== null && $sp->supplier_external_id !== '') {
+                try {
+                    $client->deleteProject((int) $sp->supplier_external_id);
+                } catch (Throwable $e) {
+                    Log::warning('supplier.delete_donor_failed', [
+                        'supplier_project_id' => $id, 'error' => $e->getMessage(),
+                    ]);
+                    throw $e; // retry the job
+                }
+            }
+
+            $sp->delete();
+        }
+
+        if ($needsResync) {
+            SyncSupplierProjectsJob::dispatch();
+        }
+    }
+}
diff --git a/app/phpstan-baseline.neon b/app/phpstan-baseline.neon
index f1c480f9..e93cb016 100644
--- a/app/phpstan-baseline.neon
+++ b/app/phpstan-baseline.neon
@@ -1938,6 +1938,12 @@ parameters:
 			count: 2
 			path: tests/Feature/Supplier/FailoverProjectChannelLiveSmokeTest.php
 
+		-
+			message: '#^Call to an undefined method Mockery\\ExpectationInterface\|Mockery\\HigherOrderMessage\:\:once\(\)\.$#'
+			identifier: method.notFound
+			count: 1
+			path: tests/Feature/Supplier/DeleteSupplierProjectJobTest.php
+
 		-
 			message: '#^Call to an undefined method Pest\\PendingCalls\\TestCall\:\:artisan\(\)\.$#'
 			identifier: method.notFound
diff --git a/app/tests/Feature/Supplier/DeleteSupplierProjectJobTest.php b/app/tests/Feature/Supplier/DeleteSupplierProjectJobTest.php
new file mode 100644
index 00000000..7fa8275c
--- /dev/null
+++ b/app/tests/Feature/Supplier/DeleteSupplierProjectJobTest.php
@@ -0,0 +1,58 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Jobs\Supplier\DeleteSupplierProjectJob;
+use App\Jobs\Supplier\SyncSupplierProjectsJob;
+use App\Models\Project;
+use App\Models\SupplierProject;
+use App\Models\Tenant;
+use App\Services\Supplier\SupplierPortalClient;
+use Illuminate\Foundation\Testing\DatabaseTransactions;
+use Illuminate\Support\Facades\Bus;
+use Illuminate\Support\Facades\DB;
+use Tests\Concerns\SharesSupplierPdo;
+
+uses(DatabaseTransactions::class, SharesSupplierPdo::class);
+
+it('deletes donor at supplier when no consumers remain', function (): void {
+    $sp = SupplierProject::query()->create([
+        'platform' => 'B1', 'signal_type' => 'call', 'unique_key' => '79991110000',
+        'supplier_external_id' => '555', 'current_limit' => 1,
+    ]);
+
+    $mock = Mockery::mock(SupplierPortalClient::class);
+    $mock->shouldReceive('deleteProject')->once()->with(555);
+    app()->instance(SupplierPortalClient::class, $mock);
+
+    (new DeleteSupplierProjectJob([$sp->id]))->handle(app(SupplierPortalClient::class));
+
+    expect(SupplierProject::find($sp->id))->toBeNull();
+});
+
+it('does NOT delete donor at supplier when other consumers remain; re-syncs', function (): void {
+    Bus::fake([SyncSupplierProjectsJob::class]);
+
+    $tenant = Tenant::factory()->create(['balance_leads' => 100]);
+    $sp = SupplierProject::query()->create([
+        'platform' => 'B1', 'signal_type' => 'call', 'unique_key' => '79991110001',
+        'supplier_external_id' => '556', 'current_limit' => 1,
+    ]);
+    $other = Project::factory()->create(['tenant_id' => $tenant->id]);
+
+    DB::table('project_supplier_links')->insert([
+        'project_id' => $other->id,
+        'supplier_project_id' => $sp->id,
+        'platform' => 'B1',
+        'subject_code' => null,
+    ]);
+
+    $mock = Mockery::mock(SupplierPortalClient::class);
+    $mock->shouldNotReceive('deleteProject');
+    app()->instance(SupplierPortalClient::class, $mock);
+
+    (new DeleteSupplierProjectJob([$sp->id]))->handle(app(SupplierPortalClient::class));
+
+    expect(SupplierProject::find($sp->id))->not->toBeNull();
+    Bus::assertDispatched(SyncSupplierProjectsJob::class);
+});