diff --git a/src/gui/processing/qgsprocessingfieldmapwidgetwrapper.cpp b/src/gui/processing/qgsprocessingfieldmapwidgetwrapper.cpp
index a836cab18f2a..d145bf5d5cca 100644
--- a/src/gui/processing/qgsprocessingfieldmapwidgetwrapper.cpp
+++ b/src/gui/processing/qgsprocessingfieldmapwidgetwrapper.cpp
@@ -25,7 +25,7 @@
 #include "qgspanelwidget.h"
 
 #include "qgsprocessingcontext.h"
-#include "qgsvectortilewriter.h"
+#include "qgsprocessingmodelalgorithm.h"
 
 #include "qgsprocessingparameterfieldmap.h"
 
@@ -178,6 +178,69 @@ void QgsProcessingFieldMapPanelWidget::loadLayerFields()
   }
 }
 
+//
+// QgsProcessingFieldMapParameterDefinitionWidget
+//
+
+QgsProcessingFieldMapParameterDefinitionWidget::QgsProcessingFieldMapParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm, QWidget *parent )
+  : QgsProcessingAbstractParameterDefinitionWidget( context, widgetContext, definition, algorithm, parent )
+{
+  QVBoxLayout *vlayout = new QVBoxLayout();
+  vlayout->setMargin( 0 );
+  vlayout->setContentsMargins( 0, 0, 0, 0 );
+
+  vlayout->addWidget( new QLabel( tr( "Parent layer" ) ) );
+
+  mParentLayerComboBox = new QComboBox();
+  mParentLayerComboBox->addItem( tr( "None" ), QVariant() );
+
+  QString initialParent;
+  if ( const QgsProcessingParameterFieldMapping *mapParam = dynamic_cast<const QgsProcessingParameterFieldMapping *>( definition ) )
+    initialParent = mapParam->parentLayerParameterName();
+
+  if ( widgetContext.model() )
+  {
+    // populate combo box with other model input choices
+    const QMap<QString, QgsProcessingModelParameter> components = widgetContext.model()->parameterComponents();
+    for ( auto it = components.constBegin(); it != components.constEnd(); ++it )
+    {
+      if ( const QgsProcessingParameterFeatureSource *definition = dynamic_cast< const QgsProcessingParameterFeatureSource * >( widgetContext.model()->parameterDefinition( it.value().parameterName() ) ) )
+      {
+        mParentLayerComboBox-> addItem( definition->description(), definition->name() );
+        if ( !initialParent.isEmpty() && initialParent == definition->name() )
+        {
+          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
+        }
+      }
+      else if ( const QgsProcessingParameterVectorLayer *definition = dynamic_cast< const QgsProcessingParameterVectorLayer * >( widgetContext.model()->parameterDefinition( it.value().parameterName() ) ) )
+      {
+        mParentLayerComboBox-> addItem( definition->description(), definition->name() );
+        if ( !initialParent.isEmpty() && initialParent == definition->name() )
+        {
+          mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
+        }
+      }
+    }
+  }
+
+  if ( mParentLayerComboBox->count() == 1 && !initialParent.isEmpty() )
+  {
+    // if no parent candidates found, we just add the existing one as a placeholder
+    mParentLayerComboBox->addItem( initialParent, initialParent );
+    mParentLayerComboBox->setCurrentIndex( mParentLayerComboBox->count() - 1 );
+  }
+
+  vlayout->addWidget( mParentLayerComboBox );
+  setLayout( vlayout );
+}
+
+QgsProcessingParameterDefinition *QgsProcessingFieldMapParameterDefinitionWidget::createParameter( const QString &name, const QString &description, QgsProcessingParameterDefinition::Flags flags ) const
+{
+  auto param = qgis::make_unique< QgsProcessingParameterFieldMapping >( name, description, mParentLayerComboBox->currentData().toString() );
+  param->setFlags( flags );
+  return param.release();
+}
+
 //
 // QgsProcessingFieldMapWidgetWrapper
 //
@@ -210,6 +273,11 @@ QWidget *QgsProcessingFieldMapWidgetWrapper::createWidget()
   return mPanel;
 }
 
+QgsProcessingAbstractParameterDefinitionWidget *QgsProcessingFieldMapWidgetWrapper::createParameterDefinitionWidget( QgsProcessingContext &context, const QgsProcessingParameterWidgetContext &widgetContext, const QgsProcessingParameterDefinition *definition, const QgsProcessingAlgorithm *algorithm )
+{
+  return new QgsProcessingFieldMapParameterDefinitionWidget( context, widgetContext, definition, algorithm );
+}
+
 void QgsProcessingFieldMapWidgetWrapper::postInitialize( const QList<QgsAbstractProcessingParameterWidgetWrapper *> &wrappers )
 {
   QgsAbstractProcessingParameterWidgetWrapper::postInitialize( wrappers );
@@ -318,3 +386,5 @@ const QgsVectorLayer *QgsProcessingFieldMapWidgetWrapper::linkedVectorLayer() co
 }
 
 /// @endcond
+
+
diff --git a/src/gui/processing/qgsprocessingfieldmapwidgetwrapper.h b/src/gui/processing/qgsprocessingfieldmapwidgetwrapper.h
index 8812af65eb92..37f90bde983e 100644
--- a/src/gui/processing/qgsprocessingfieldmapwidgetwrapper.h
+++ b/src/gui/processing/qgsprocessingfieldmapwidgetwrapper.h
@@ -19,7 +19,7 @@
 #define SIP_NO_FILE
 
 #include "qgsprocessingwidgetwrapper.h"
-#include "qgsprocessingmultipleselectiondialog.h"
+#include "qgsprocessingparameterdefinitionwidget.h"
 
 #include "ui_qgsprocessingfieldsmappingpanelbase.h"
 
@@ -58,6 +58,24 @@ class GUI_EXPORT QgsProcessingFieldMapPanelWidget : public QgsPanelWidget, priva
 };
 
 
+class GUI_EXPORT QgsProcessingFieldMapParameterDefinitionWidget : public QgsProcessingAbstractParameterDefinitionWidget
+{
+    Q_OBJECT
+  public:
+
+    QgsProcessingFieldMapParameterDefinitionWidget( QgsProcessingContext &context,
+        const QgsProcessingParameterWidgetContext &widgetContext,
+        const QgsProcessingParameterDefinition *definition = nullptr,
+        const QgsProcessingAlgorithm *algorithm = nullptr, QWidget *parent SIP_TRANSFERTHIS = nullptr );
+    QgsProcessingParameterDefinition *createParameter( const QString &name, const QString &description, QgsProcessingParameterDefinition::Flags flags ) const override;
+
+  private:
+
+    QComboBox *mParentLayerComboBox = nullptr;
+
+};
+
+
 class GUI_EXPORT QgsProcessingFieldMapWidgetWrapper : public QgsAbstractProcessingParameterWidgetWrapper, public QgsProcessingParameterWidgetFactoryInterface
 {
     Q_OBJECT
@@ -73,6 +91,11 @@ class GUI_EXPORT QgsProcessingFieldMapWidgetWrapper : public QgsAbstractProcessi
 
     // QgsProcessingParameterWidgetWrapper interface
     QWidget *createWidget() override SIP_FACTORY;
+    QgsProcessingAbstractParameterDefinitionWidget *createParameterDefinitionWidget(
+      QgsProcessingContext &context,
+      const QgsProcessingParameterWidgetContext &widgetContext,
+      const QgsProcessingParameterDefinition *definition = nullptr,
+      const QgsProcessingAlgorithm *algorithm = nullptr ) override;
 
     void postInitialize( const QList< QgsAbstractProcessingParameterWidgetWrapper * > &wrappers ) override;
     int stretch() const override;
diff --git a/tests/src/gui/testprocessinggui.cpp b/tests/src/gui/testprocessinggui.cpp
index 1cedb2ad4a84..8b0f04f1dede 100644
--- a/tests/src/gui/testprocessinggui.cpp
+++ b/tests/src/gui/testprocessinggui.cpp
@@ -7350,6 +7350,34 @@ void TestProcessingGui::testFieldMapWrapper()
 
   // modeler wrapper
   testWrapper( QgsProcessingGui::Modeler );
+
+  // config widget
+  QgsProcessingParameterWidgetContext widgetContext;
+  QgsProcessingContext context;
+  std::unique_ptr< QgsProcessingParameterDefinitionWidget > widget = qgis::make_unique< QgsProcessingParameterDefinitionWidget >( QStringLiteral( "fields_mapping" ), context, widgetContext );
+  std::unique_ptr< QgsProcessingParameterDefinition > def( widget->createParameter( QStringLiteral( "param_name" ) ) );
+  QCOMPARE( def->name(), QStringLiteral( "param_name" ) );
+  QVERIFY( !( def->flags() & QgsProcessingParameterDefinition::FlagOptional ) ); // should default to mandatory
+  QVERIFY( !( def->flags() & QgsProcessingParameterDefinition::FlagAdvanced ) );
+
+  // using a parameter definition as initial values
+  QgsProcessingParameterFieldMapping mapParam( QStringLiteral( "n" ), QStringLiteral( "test desc" ), QStringLiteral( "parent" ) );
+  widget = qgis::make_unique< QgsProcessingParameterDefinitionWidget >( QStringLiteral( "fields_mapping" ), context, widgetContext, &mapParam );
+  def.reset( widget->createParameter( QStringLiteral( "param_name" ) ) );
+  QCOMPARE( def->name(), QStringLiteral( "param_name" ) );
+  QCOMPARE( def->description(), QStringLiteral( "test desc" ) );
+  QVERIFY( !( def->flags() & QgsProcessingParameterDefinition::FlagOptional ) );
+  QVERIFY( !( def->flags() & QgsProcessingParameterDefinition::FlagAdvanced ) );
+  QCOMPARE( static_cast< QgsProcessingParameterFieldMapping * >( def.get() )->parentLayerParameterName(), QStringLiteral( "parent" ) );
+  mapParam.setFlags( QgsProcessingParameterDefinition::FlagAdvanced | QgsProcessingParameterDefinition::FlagOptional );
+  mapParam.setParentLayerParameterName( QString() );
+  widget = qgis::make_unique< QgsProcessingParameterDefinitionWidget >( QStringLiteral( "fields_mapping" ), context, widgetContext, &mapParam );
+  def.reset( widget->createParameter( QStringLiteral( "param_name" ) ) );
+  QCOMPARE( def->name(), QStringLiteral( "param_name" ) );
+  QCOMPARE( def->description(), QStringLiteral( "test desc" ) );
+  QVERIFY( def->flags() & QgsProcessingParameterDefinition::FlagOptional );
+  QVERIFY( def->flags() & QgsProcessingParameterDefinition::FlagAdvanced );
+  QVERIFY( static_cast< QgsProcessingParameterFieldMapping * >( def.get() )->parentLayerParameterName().isEmpty() );
 }
 
 void TestProcessingGui::testOutputDefinitionWidget()