diff --git a/Marlin/MarlinSerial.cpp b/Marlin/MarlinSerial.cpp
index ad23a062051a..abf3299b1d04 100644
--- a/Marlin/MarlinSerial.cpp
+++ b/Marlin/MarlinSerial.cpp
@@ -32,6 +32,8 @@
   ring_buffer rx_buffer  =  { { 0 }, 0, 0 };
 #endif
 
+bool ser_chars_rejected = false;
+
 FORCE_INLINE void store_char(unsigned char c) {
   int i = (unsigned int)(rx_buffer.head + 1) % RX_BUFFER_SIZE;
 
@@ -42,6 +44,10 @@ FORCE_INLINE void store_char(unsigned char c) {
   if (i != rx_buffer.tail) {
     rx_buffer.buffer[rx_buffer.head] = c;
     rx_buffer.head = i;
+  } 
+  else 
+  {
+    ser_chars_rejected = true;
   }
 }
 
diff --git a/Marlin/MarlinSerial.h b/Marlin/MarlinSerial.h
index c59884a28792..399e86b60d8e 100644
--- a/Marlin/MarlinSerial.h
+++ b/Marlin/MarlinSerial.h
@@ -78,6 +78,8 @@ struct ring_buffer {
   int tail;
 };
 
+extern bool ser_chars_rejected;
+
 #if UART_PRESENT(SERIAL_PORT)
   extern ring_buffer rx_buffer;
 #endif
diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index d21bd599e97d..6e4472a3acbd 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -733,6 +733,13 @@ void setup() {
  *  - Call LCD update
  */
 void loop() {
+  if ( ser_chars_rejected ) {
+    SERIAL_ERROR_START;
+    SERIAL_ECHOLNPGM("Serial: incoming chars rejected - ring buffer full");
+    //kill(PSTR("ERR: ring buffer full")); 
+    ser_chars_rejected = false;
+  }
+
   if (commands_in_queue < BUFSIZE - 1) get_command();
 
   #if ENABLED(SDSUPPORT)