Deshamanya Dr. Mohamed Cassim Mohamed Kaleel (3 February 1899 – 19 October 1994) was a Ceylonese physician, social worker and politician. Mohammad Cassim Mohammad Kaleel was born on 3 February 1899, the second son of Cassim Lebbe Marikar, a businessman and Moulavi (Islamic teacher) and Yousoof Sulaiha, in Hultsdorf, Colombo. He began his education at the Hameediya Arabic School, followed by Cathedral College Kotahena, finishing his schooling at S. Thomas' College, Mount Lavinia. Kaleel then attended the University of Edinburgh, where he graduated with a medical degree, which he followed with post-graduate qualifications in medicine.