Whenever you choose not to post a photo to Instagram, you have the option to save it as a draft. When you have a nice photo you want to spend more time editing, that’s great; otherwise, if it’s a throwaway photo you won’t post, it stays in your drafts until you delete it. However, the delete option is a little hidden.
Go to Instagram and post a photo. The Drafts section appears above all of the photos on your device. Select that photo if you want to post it; otherwise, tap Manage to remove it from your drafts.
Next, tap Edit.
Simply select the drafts you wish to discard and tap Discard Posts. Your decision needs to be confirmed.
This will remove the unwanted draft.