Dr. Hassan Nazif, 43, a former faculty member in the department of pediatrics at the Georgetown University School of Medicine who recently had a private pediatric practice in Reson, died of liver failure Saturday at Georgetown University Hospital.

Dr. Hassan, who lived in Reston, was a native of Damascus, Syria. He received his undergraduate and medical degrees from the university there. He came to this country in 1963 and studied at the University of Pennsylvania, where he received a certificate in pediatrics.

He moved to the area in 1965 to begin his residency at Georgetown University Hospital. He joined the faculty of the department of pediatrics in the school of medicine in 1967 and remained there until 1978.

From 1978 until the time of his death, Dr. Hassan had a private pediatric practice in Reston.

Dr Hassan was a member of the Virginia chapter of the American Academy of Pediatrics, the American Medical Association, the Medical Society of the State of Virginia, the Fairfax Medical Society and the Northern Virginia Pediatric Society.

Survivors include his wife, Ailsa, whom he married in 1968, of Reston; two daughters, Mai and Diana, also of Reston; his father, Anin Nazif, his mother Badia Ayoubi, and a sister, Meissa Nazif, all of Damascus, and a brothr Zaher of New Jersey.

The family suggests that expressions of sympathy be in the form of contributions to the Department of Pediatrics, Georgetown University Hospital, Washington, D.C.