If you delete a Snapchat account, all of the photos and videos you’ve shared with that account will be deleted. You won’t be able to recover them or view them again. ..
When you delete your Snapchat account, your friends will no longer be able to see your stories. They can still send you snaps, but they won’t be able to view your story.
Deletion of a Snapchat account does not delete conversations that the user has with other users.
One way to tell if someone deleted their Snapchat account is by checking their username. If their username disappears, then it’s likely that they deleted their account.
Deleting Snapchat will only delete the app from your phone. If you have a backup on an iCloud or Google account, then deleting Snapchat will not delete anything.
Snapchat photos are deleted by Snapchat when they are viewed, so it is possible that the photos will still exist on your phone.
If you delete Snapchat and then redownload it, all the data will be deleted. This includes your account username and password, any filters applied to photos taken on the app, and any saved stories.