Lee plans to go on an LDS Church mission when he graduates from high school next spring and will be a freshman at BYU in 2019-20, according to a school news release.
"Kolby will be a great addition to our program," Rose said. "He will add size, athleticism and skill to our frontline. We're excited that Kolby will be a part of the future of BYU basketball."
Lee was named to the 5A All-Idaho Second Team by the Idaho Statesman. He was also recruited by Utah State, Boise State, Richmond, Portland, Kent State, DePaul and UC Davis.