The 2019–20 Arizona State Sun Devils men's basketball team represented Arizona State University during the 2019–20 NCAA Division I men's basketball season.

The Sun Devils were led by fifth-year head coach Bobby Hurley, and played their home games at Desert Financial Arena in Tempe, Arizona as members of the Pac–12 Conference.

They were set to take on Washington State in the quarterfinals of the Pac-12 tournament.

In the Pac-12 tournament, the Sun Devils defeated UCLA in the quarterfinals and lost to Oregon in the semifinals.

They received an at-large bid to the NCAA tournament where they defeated St. John's in the First Four, and eventually lost in the first round to Buffalo.