Question: can you see when someone removes you as a friend on snapchat?
Answer: Yes, they will know if you have deleted them, and removed them from your friend's list on Snapchat. In every Snapchat user's profile, there is a list of “Snapchatters who have added you back”. If they check the list and you are not in there, they'll be able to understand that they've been removed as a friend.