Christian Arnold, David Martin and Geoff Morrow of the band Butterscotch are also credited as songwriters, due to an interpolation of their song "Can't Smile Without You" in the chorus of "Leave Before You Love Me".

"Leave Before You Love Me" is a "sweet hooky pop ballad" about regret and moving on before further heartbreak ensues.

[5] The official music video of the song, directed by Christian Breslauer was released to Marshmello's YouTube channel on May 24, 2021.

[10] The song is often played on the PA system at Citizens Bank Park, the home of Major League Baseball’s Philadelphia Phillies, whenever the Phillies lose a game; although at times, The Weeknd’s song “Save Your Tears” may be played instead.

Most notably, when the Phillies were on the losing end of a no-hitter in Game 4 of the 2022 World Series, the song was played right after the final out was recorded.