diff --git a/modules/audio_processing/audio_processing_impl.cc b/modules/audio_processing/audio_processing_impl.cc
index 08d1ac0fef..c7d59b84d5 100644
--- a/modules/audio_processing/audio_processing_impl.cc
+++ b/modules/audio_processing/audio_processing_impl.cc
@@ -19,7 +19,6 @@
 #include "common_audio/include/audio_util.h"
 #include "common_audio/signal_processing/include/signal_processing_library.h"
 #include "modules/audio_processing/aec/aec_core.h"
-#include "modules/audio_processing/aec3/echo_canceller3.h"
 #include "modules/audio_processing/agc/agc_manager_direct.h"
 #include "modules/audio_processing/agc2/gain_controller2.h"
 #include "modules/audio_processing/audio_buffer.h"
@@ -736,18 +735,6 @@ void AudioProcessingImpl::ApplyConfig(const AudioProcessing::Config& config) {
   RTC_LOG(LS_INFO) << "Highpass filter activated: "
                    << config_.high_pass_filter.enabled;
 
-  // Deprecated way of activating AEC3.
-  // TODO(gustaf): Remove when possible.
-  if (config.echo_canceller3.enabled && !echo_control_factory_) {
-    capture_nonlocked_.echo_controller_enabled =
-        config_.echo_canceller3.enabled;
-    echo_control_factory_ =
-        std::unique_ptr<EchoControlFactory>(new EchoCanceller3Factory());
-    InitializeEchoController();
-    RTC_LOG(LS_INFO) << "Echo canceller 3 activated: "
-                     << capture_nonlocked_.echo_controller_enabled;
-  }
-
   config_ok = GainController2::Validate(config_.gain_controller2);
   if (!config_ok) {
     RTC_LOG(LS_ERROR) << "AudioProcessing module config error" << std::endl
diff --git a/modules/audio_processing/audio_processing_unittest.cc b/modules/audio_processing/audio_processing_unittest.cc
index a75037b247..ecaeed3edc 100644
--- a/modules/audio_processing/audio_processing_unittest.cc
+++ b/modules/audio_processing/audio_processing_unittest.cc
@@ -3005,7 +3005,6 @@ std::unique_ptr<AudioProcessing> CreateApm(bool use_AEC2) {
   // Disable all components except for an AEC and the residual echo detector.
   AudioProcessing::Config config;
   config.residual_echo_detector.enabled = true;
-  config.echo_canceller3.enabled = false;
   config.high_pass_filter.enabled = false;
   config.gain_controller2.enabled = false;
   config.level_controller.enabled = false;
diff --git a/modules/audio_processing/include/audio_processing.h b/modules/audio_processing/include/audio_processing.h
index c8a1e55c97..5185a1fe6f 100644
--- a/modules/audio_processing/include/audio_processing.h
+++ b/modules/audio_processing/include/audio_processing.h
@@ -276,12 +276,6 @@ class AudioProcessing : public rtc::RefCountInterface {
       bool enabled = false;
     } high_pass_filter;
 
-    // Deprecated way of activating AEC3.
-    // TODO(gustaf): Remove when possible.
-    struct EchoCanceller3 {
-      bool enabled = false;
-    } echo_canceller3;
-
     // Enables the next generation AGC functionality. This feature replaces the
     // standard methods of gain control in the previous AGC.
     // The functionality is not yet activated in the code and turning this on