Diallo is a four-star wing via ESPN and ranks 90th on the 2016 ESPN100. The 6-7, 195-pounder originally hails from Denver, Colorado. Per his ESPN scouting report, "Diallo has that prototypical Division I frame with extraordinary length. He has the physical tools to be a high-major finesse 4-man due to his evolving ball skills and athleticism. In transition he can slash his way to the rim or pull-up and nail the mid-range jump shot."