Allen Steward Hammond III, 50, a retired civilian employe of the D.C. police department and a former minister of music at the 12th Street Christian Church here, died Saturday at the Veterans Administration Hospital after a heart attack.

Mr. Hammond worked for the federal and D.C. governments for 25 years before retiring from the intelligence section of the D.C. police department's special operations division in 1973 for reasons of health. Earlier, he worked for the Navy Department.

A tenor who sang professionally, he had studied voice at Howard University and the University of Pennsylvania. During his military service, he was assigned to the Army's Special Services and entertained troops in Korea during the war there. He later appeared on the stage in New York and in concerts here and on numerous radio and television programs.

Before joining the 12th Street Christian Church here, from which he also retired in 1973 as minister of music, choir director and soloist, Mr. Hammond held those positions with the Metropolitan AME, New Bethel Baptist and Vermont Avenue Baptist churches here.

Mr. Hammond and his wife, Dorothy C. Hammond, founded the International Foundation for Performing and Creative Arts Inc., a nonprofit organization that provides scholarships in the arts.

Mr. Hammond, who lived in Hyattsville, was born and reared in Washington and graduated from Dunbar and Armstrong high schools. In 1971, he received an honorary doctor of divinity degree from the Universal Life Church in Los Angeles.

In addition to his wife, of Hyattsville, survivors include two daughters, Serena, also of Hyattsville, and Denise Hammond-Wiggins of Washington; two sons, Allen S. IV, of Silver Spring, and Vincent S., of Mount Rainier; four stepchildren, Robert Hammond and Willette, Regina and Dorothea Green, four foster children, Denise, Reginald, Raymond and Charles Calhoun, and an adopted daughter, Costella Hunt, all of Washington, and six grandchildren.

The family suggests that expressions of sympathy be in the form of contributions to the Laura Mabel Hammond Scholarship Fund, International Foundation for the Performing and Creative Arts, c/o Elder Oscar Haynes, Administrator, 1220 Montello Avenue NE, Washington.