diff --git a/SyncCalendarsIntoOne.gs b/SyncCalendarsIntoOne.gs
index 1bb75b9..b41d838 100644
--- a/SyncCalendarsIntoOne.gs
+++ b/SyncCalendarsIntoOne.gs
@@ -21,6 +21,9 @@ const DEFAULT_EVENT_TITLE = "Busy"
 // https://unicode-table.com/en/200B/
 const SEARCH_CHARACTER = "\u200B"
 
+// Do not sync declined events. Default: false (do sync)
+const DO_NOT_SYNC_DECLINED = false
+
 // ----------------------------------------------------------------------------
 // DO NOT TOUCH FROM HERE ON
 // ----------------------------------------------------------------------------
@@ -111,6 +114,11 @@ function createEvents(startTime, endTime) {
       if (event.transparency && event.transparency === "transparent") {
         return
       }
+      
+      // Don't copy declined events.
+      if (DO_NOT_SYNC_DECLINED && event.attendees && event.attendees.find((at) => at.self) && event.attendees.find((at) => at.self)['responseStatus'] == 'declined') {
+        return
+      }
 
       // If event.summary is undefined, empty, or null, set it to default title
       if (!event.summary || event.summary === "") {