[1][2] Abdelfattah was born and raised in Chicago, Illinois, to parents who had immigrated from Palestine as part of the 1967 Palestinian exodus.
[3] Abdelfattah attended a private Muslim school until the eighth grade and then moved to the public system.
[5] Abdelfattah was named the NBA G League Coach of the Year for the 2021–22 season after leading the Vipers to a 24–10 record.
[7] On June 21, 2023, Abdelfattah was hired as head coach of the Sydney Kings of the Australian National Basketball League (NBL) for the 2023–24 season.
[3] He was only lightly religious during his early years but adjusted his attitude after the death of his mother from a heart attack when he was aged 19.