diff --git a/pkg/controller/infrastructure/openstack/actuator_delete.go b/pkg/controller/infrastructure/openstack/actuator_delete.go
index 68ac72ba..eeb5612d 100644
--- a/pkg/controller/infrastructure/openstack/actuator_delete.go
+++ b/pkg/controller/infrastructure/openstack/actuator_delete.go
@@ -10,6 +10,8 @@ import (
 
 	extensionscontroller "github.com/gardener/gardener/extensions/pkg/controller"
 	"github.com/gardener/gardener/extensions/pkg/util"
+	gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
+	gardenerapihelper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
 	extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
 	"github.com/go-logr/logr"
 
@@ -23,8 +25,13 @@ import (
 
 // Delete the Infrastructure config.
 func (a *actuator) Delete(ctx context.Context, log logr.Logger, infra *extensionsv1alpha1.Infrastructure, cluster *extensionscontroller.Cluster) error {
+	err := a.delete(ctx, log, infra, cluster)
+	if openstackclient.IsConflict(err) {
+		return gardenerapihelper.NewErrorWithCodes(err, gardencorev1beta1.ErrorInfraDependencies)
+	}
+
 	return util.DetermineError(
-		a.delete(ctx, log, infra, cluster),
+		err,
 		helper.KnownCodes,
 	)
 }
diff --git a/pkg/controller/infrastructure/stackit/actuator_delete.go b/pkg/controller/infrastructure/stackit/actuator_delete.go
index fb58913e..4019314a 100644
--- a/pkg/controller/infrastructure/stackit/actuator_delete.go
+++ b/pkg/controller/infrastructure/stackit/actuator_delete.go
@@ -10,6 +10,8 @@ import (
 
 	extensionscontroller "github.com/gardener/gardener/extensions/pkg/controller"
 	"github.com/gardener/gardener/extensions/pkg/util"
+	gardencorev1beta1 "github.com/gardener/gardener/pkg/apis/core/v1beta1"
+	gardenerapihelper "github.com/gardener/gardener/pkg/apis/core/v1beta1/helper"
 	extensionsv1alpha1 "github.com/gardener/gardener/pkg/apis/extensions/v1alpha1"
 	"github.com/go-logr/logr"
 
@@ -23,8 +25,13 @@ import (
 
 // Delete the Infrastructure config.
 func (a *actuator) Delete(ctx context.Context, log logr.Logger, infra *extensionsv1alpha1.Infrastructure, cluster *extensionscontroller.Cluster) error {
+	err := a.delete(ctx, log, infra, cluster)
+	if stackitclient.IsConflict(err) {
+		return gardenerapihelper.NewErrorWithCodes(err, gardencorev1beta1.ErrorInfraDependencies)
+	}
+
 	return util.DetermineError(
-		a.delete(ctx, log, infra, cluster),
+		err,
 		helper.KnownCodes,
 	)
 }
diff --git a/pkg/openstack/client/errors.go b/pkg/openstack/client/errors.go
new file mode 100644
index 00000000..d5584ad5
--- /dev/null
+++ b/pkg/openstack/client/errors.go
@@ -0,0 +1,24 @@
+package client
+
+import (
+	"errors"
+	"net/http"
+)
+
+// StatusCodeError is a common interface implemented by Error and the SDK's GenericOpenAPIError.
+type StatusCodeError interface {
+	error
+	GetStatusCode() int
+}
+
+// GetStatusCode returns the attached error code if the given error implements StatusCodeError or 0 otherwise.
+func GetStatusCode(err error) int {
+	var statusCodeError StatusCodeError
+	if ok := errors.As(err, &statusCodeError); !ok {
+		return 0
+	}
+
+	return statusCodeError.GetStatusCode()
+}
+
+func IsConflict(err error) bool { return GetStatusCode(err) == http.StatusConflict }
diff --git a/pkg/stackit/client/errors.go b/pkg/stackit/client/errors.go
index 2bda6833..5a4a15bb 100644
--- a/pkg/stackit/client/errors.go
+++ b/pkg/stackit/client/errors.go
@@ -51,6 +51,8 @@ func IsNotFound(err error) bool {
 	return GetStatusCode(err) == http.StatusNotFound
 }
 
+func IsConflict(err error) bool { return GetStatusCode(err) == http.StatusConflict }
+
 // IgnoreNotFoundError ignore not found error
 func IgnoreNotFoundError(err error) error {
 	if IsNotFound(err) {