diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java b/service/src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java
index fb47fc141..0b17acb97 100644
--- a/service/src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java
+++ b/service/src/main/java/org/whispersystems/textsecuregcm/WhisperServerService.java
@@ -111,7 +111,6 @@ import org.whispersystems.textsecuregcm.controllers.AccountControllerV2;
 import org.whispersystems.textsecuregcm.controllers.ArchiveController;
 import org.whispersystems.textsecuregcm.controllers.ArtController;
 import org.whispersystems.textsecuregcm.controllers.AttachmentControllerV2;
-import org.whispersystems.textsecuregcm.controllers.AttachmentControllerV3;
 import org.whispersystems.textsecuregcm.controllers.AttachmentControllerV4;
 import org.whispersystems.textsecuregcm.controllers.CallLinkController;
 import org.whispersystems.textsecuregcm.controllers.CallRoutingController;
@@ -1101,7 +1100,6 @@ public class WhisperServerService extends Application<WhisperServerConfiguration
             config.getAwsAttachmentsConfiguration().credentials().accessKeyId().value(),
             config.getAwsAttachmentsConfiguration().credentials().secretAccessKey().value(),
             config.getAwsAttachmentsConfiguration().region(), config.getAwsAttachmentsConfiguration().bucket()),
-        new AttachmentControllerV3(rateLimiters, gcsAttachmentGenerator),
         new AttachmentControllerV4(rateLimiters, gcsAttachmentGenerator, tusAttachmentGenerator,
             experimentEnrollmentManager),
         new ArchiveController(backupAuthManager, backupManager),
diff --git a/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AttachmentControllerV3.java b/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AttachmentControllerV3.java
deleted file mode 100644
index ab8d2f68c..000000000
--- a/service/src/main/java/org/whispersystems/textsecuregcm/controllers/AttachmentControllerV3.java
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Copyright 2013 Signal Messenger, LLC
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-package org.whispersystems.textsecuregcm.controllers;
-
-import io.dropwizard.auth.Auth;
-import io.swagger.v3.oas.annotations.tags.Tag;
-import java.io.IOException;
-import java.security.InvalidKeyException;
-import java.security.SecureRandom;
-import java.security.spec.InvalidKeySpecException;
-import java.util.Base64;
-import javax.annotation.Nonnull;
-import javax.ws.rs.GET;
-import javax.ws.rs.Path;
-import javax.ws.rs.Produces;
-import javax.ws.rs.core.MediaType;
-import org.whispersystems.textsecuregcm.attachments.AttachmentGenerator;
-import org.whispersystems.textsecuregcm.attachments.GcsAttachmentGenerator;
-import org.whispersystems.textsecuregcm.auth.AuthenticatedDevice;
-import org.whispersystems.textsecuregcm.entities.AttachmentDescriptorV3;
-import org.whispersystems.textsecuregcm.limits.RateLimiter;
-import org.whispersystems.textsecuregcm.limits.RateLimiters;
-import org.whispersystems.websocket.auth.ReadOnly;
-
-// To be removed when Desktop 7.17 reaches saturation, likely some time toward the end of October 2024
-@Deprecated(forRemoval = true)
-@Path("/v3/attachments")
-@Tag(name = "Attachments")
-public class AttachmentControllerV3 {
-
-  @Nonnull
-  private final RateLimiter rateLimiter;
-
-  @Nonnull
-  private final GcsAttachmentGenerator gcsAttachmentGenerator;
-
-  @Nonnull
-  private final SecureRandom secureRandom;
-
-  public AttachmentControllerV3(@Nonnull RateLimiters rateLimiters, @Nonnull GcsAttachmentGenerator gcsAttachmentGenerator)
-      throws IOException, InvalidKeyException, InvalidKeySpecException {
-    this.rateLimiter = rateLimiters.getAttachmentLimiter();
-    this.gcsAttachmentGenerator = gcsAttachmentGenerator;
-    this.secureRandom = new SecureRandom();
-  }
-
-  @GET
-  @Produces(MediaType.APPLICATION_JSON)
-  @Path("/form/upload")
-  public AttachmentDescriptorV3 getAttachmentUploadForm(@ReadOnly @Auth AuthenticatedDevice auth)
-      throws RateLimitExceededException {
-    rateLimiter.validate(auth.getAccount().getUuid());
-    final String key = generateAttachmentKey();
-    final AttachmentGenerator.Descriptor descriptor = this.gcsAttachmentGenerator.generateAttachment(key);
-    return new AttachmentDescriptorV3(2, key, descriptor.headers(), descriptor.signedUploadLocation());
-  }
-
-  private String generateAttachmentKey() {
-    final byte[] bytes = new byte[15];
-    secureRandom.nextBytes(bytes);
-    return Base64.getUrlEncoder().encodeToString(bytes);
-  }
-}
diff --git a/service/src/test/java/org/whispersystems/textsecuregcm/controllers/AttachmentControllerTest.java b/service/src/test/java/org/whispersystems/textsecuregcm/controllers/AttachmentControllerTest.java
index 005ebf173..6f20b19c9 100644
--- a/service/src/test/java/org/whispersystems/textsecuregcm/controllers/AttachmentControllerTest.java
+++ b/service/src/test/java/org/whispersystems/textsecuregcm/controllers/AttachmentControllerTest.java
@@ -95,7 +95,6 @@ class AttachmentControllerTest {
           .setTestContainerFactory(new GrizzlyWebTestContainerFactory())
           .addResource(new AttachmentControllerV2(RATE_LIMITERS, "accessKey", "accessSecret", "us-east-1",
               "attachmentv2-bucket"))
-          .addResource(new AttachmentControllerV3(RATE_LIMITERS, gcsAttachmentGenerator))
           .addProvider(new AttachmentControllerV4(RATE_LIMITERS,
               gcsAttachmentGenerator,
               new TusAttachmentGenerator(new TusConfiguration(new SecretBytes(TUS_SECRET), TUS_URL)),
@@ -132,16 +131,6 @@ class AttachmentControllerTest {
     assertValidCdn2Response(descriptor);
   }
 
-  @Test
-  void testV3Form() {
-    AttachmentDescriptorV3 descriptor = resources.getJerseyTest()
-            .target("/v3/attachments/form/upload")
-            .request()
-            .header("Authorization", AuthHelper.getAuthHeader(AuthHelper.VALID_UUID, AuthHelper.VALID_PASSWORD))
-            .get(AttachmentDescriptorV3.class);
-    assertValidCdn2Response(descriptor);
-  }
-
   private static void assertValidCdn2Response(final AttachmentDescriptorV3 descriptor) {
     assertThat(descriptor.key()).isNotBlank();
     assertThat(descriptor.cdn()).isEqualTo(2);