When someone deletes their Snapchat account, all of their messages and content are deleted. They will no longer be able to send or receive messages on the app.
If you suspect someone deleted their Snapchat, observe their account for a few days. If there are no new snaps, videos, or stories posted on the account, it is likely they deleted it.
If someone has deleted their account, you will be able to tell by looking at the list of followers. If the person’s name is not on the list, then they have deleted their account.
A notification will come up on the top of your screen that says “You’ve been blocked from viewing this user’s story.