As you have posted in "Forum > Messaging > Gmail", I assume you want to know if you can recover a "Discarded Draft" in Gmail. Currently, Gmail is not showing any option to retrieve the "Discarded Draft". However, earlier there used to be a yellow stripe at the top of the mail box immediately after the Draft had been discarded. Clicking this stripe would retrieve the Discarded Draft. This strip would stay as long as you don't navigate from the page.
Kindly get back if there are any further queries.