If they are a very good close friend as well as you constantly turn up in their news-feed then they might notice right away. If, however, you're merely just associates after that they might not observe for some time.
Can someone See when I Unfriend them On Facebook
You can tell if someone "unfriended" you by considering your complete quantity of friends and also if that drops by 1 or 2 you may check out your checklist of friends to see if anybody is missing.
Facebook, nevertheless, will certainly not send a notification to your friend that you removed them from your friends list. It just might take some time and ultimately they will certainly figure it out.