[8] In December 2019, Diabaté helped his team reach the City of Palms Classic final.

[3] He participated in the Basketball Without Borders Global Camp during NBA All-Star Weekend in February 2020.

On 9 November 2020, he committed to playing college basketball for Michigan over offers from Arizona, Kentucky and Memphis, among others.

[13] Sources: On 20 February 2022, Diabaté was involved in the postgame melee following a 77–63 loss to Wisconsin and appeared to throw punches.

[19] In his Summer League debut, Diabaté scored ten points and seven rebounds in a 94–76 win over the Memphis Grizzlies.

[22][23] The second time he dressed, he played in the team's 5th game on October 27, for 1:47 accumulating an assist, steal, 2 rebounds, a field goal and a free throw against the Sacramento Kings.

[25] On December 17, in his 8th NBA game, with Paul George, Ivica Zubac, Reggie Jackson and Norman Powell unable to play, he made his first start at home against the Washington Wizards.

[31] Diabaté led France to fourth place at the 2018 FIBA U16 European Championship in Novi Sad, Serbia.

At the 2019 FIBA U18 European Championship in Volos, Greece, he averaged 13.1 points, 11.1 rebounds and 2.1 blocks per game for France, who came in fifth place.