Chuma attended Westlake High School in Atlanta. As a junior, he won the Georgia Class 6A state championship, scoring 13 points in a 68–58 win over Pebblebrook High School. Chuma was named Mr. Georgia Basketball after his senior season after he averaged 24.4 points, 15 rebounds, and 2.4 steals per game.
He was a consensus four-star recruit and was ranked among the top 50 players in his class by some scouting services.
