Shirley Juanita Bartlett, 50, a secretary to three justices of the Supreme Court of the United States, died at Georgetown University Hospital on Sunday following a cerebral hemorrahage.

Mrs. Bartlett joined the Court's staff as a member or the typing pool in November 1964. In January 1965 she became secretary for Justice John Marshall Harlan. She remained on his staff until October 1969, when she became a secretary for Warren E. Burger, who had just become chief justice of the United States. She was appointed to the chambers of Justice Harry Blackmun is September 1970, and was his chief secretary at the time of her death.

Mrs. Bartlett was born in Washington. She got her early schooling in Lynchburg, Va. She went to work for the General Accounting Office in Washington in 1944 and remained there until 1962. She then lived briefly in Dallas and New York. She returned to Washington in 1964 and began her career with the Supreme Court.

Her principal hobbies were travel and ballroom dancing.

Survivors include two daughters, Jaunita Walker, of Croton-on-Hudson, N.Y., and Janice Williams, of Gapland, Md.; her father, Harry Kinsey Johnson, of Panama City, Fla.; a brother, Harry K. Johnson Jr., of Laurel; a half-brother, J. Douglas Dobyns, of Jacksonville, Fla.; a half-sister, Jeanette Albright, of Waldorf, and two grandsons.

The family suggests that expressions of sympathy be in the form of contributions to the Georgetown University Hospital neurosurgical research fund, or to a chartity of one's choice.