“Mercy” is a brooding piano ballad that focuses on heartbreak. It serves as the third single from Shawn Mendes' second studio album Illuminate.

During the week leading up to the release, Shawn released a snippet of the song every day, similar to the strategy he used for Illuminate’s lead single “Treat You Better.”

The “Mercy” music video shows Shawn trying not to figuratively drown in his emotions and literally drown underwater in a sinking car.