Aldemir made his professional debut in the Turkish Basketball Super League with Karşıyaka during the 2007–08 season.

[5] Aldemir was an early entrant in the 2012 NBA draft,[6] and was selected by the Los Angeles Clippers with the 53rd overall pick.

[10] He made his NBA debut the same day, against the Boston Celtics, recording 2 points, 2 rebounds, and 1 assist, in a 105–87 loss.

[13] Aldemir was a regular Turkish youth national team player, as he won a bronze medal at the 2009 FIBA Europe Under-18 Championship.

A year later, he played at the 2011 FIBA Europe Under-20 Championship, where he averaged 14.8 points, 15.9 rebounds, 1.3 assists, and 1.7 blocks per game.