DR. THOMAS F. QUINN, 73, a physician who had been in general practice in Silver Spring for the last 45 years, died of a heart ailment Oct. 12 at Holy Cross Hospital.

Dr. Quinn, who also lived in Silver Spring, was born in Minooka, Pa., and attended Mount St. Mary's College. He received his medical degree from Georgetown University and did his residency at Emergency Hospital in Washington.

He opened his medical practice in 1942 and was one of the original members of the medical staff at Holy Cross Hospital.

Survivors include his wife of 45 years, Billie J. Purvis Quinn of Silver Spring; two sons, Thomas Francis Quinn of Santa Ana, Calif., and John David Quinn of Adelphi; one daughter, Mary Elizabeth Gardner of Gaithersburg; four grandchildren, and two great-grandchildren.

KEVIN JOHN FOLEY, 39, a technician with the Chesapeake & Potomac Telephone Co. for the past 17 years, died of a heart ailment Oct. 10 at Northern Virginia Doctors Hospital. He lived in Alexandria.

Mr. Foley, a resident of this area since 1968, was born to American parents in Japan. He attended Northern Virginia Community College and Villanova University.

He had been a member of the Open Theater of Northern Virginia and the Sir Arthur Sullivan Society.

Survivors include his parents, retired Navy Capt. Peter J. and Rose M. Foley of McLean, and five sisters, Margaret Jones of Oakton, Kathleen Torriero and Rosemary Torriero, both of Philadelphia, and Patricia Zuiker and Susan Dolinger, both of Centreville. MARIE R. WALDROP, 86, a former resident of the Washington area who was a member of the First Lutheran Church of Bowie, died Oct. 10 in a nursing home in Lake Worth, Fla., after a stroke. She lived in West Palm Beach, Fla.

Mrs. Waldrop was a native of Kansas City, Mo. She moved to this area in the 1920s, to Harwood, Md., in 1968, and to Florida in 1980.

Her husband, Hugh M. Waldrop, died in 1982. Her survivors include one daughter, Laurena A. Williams of West Palm Beach; three sisters, Rosa Brendemihl, Lou Behnke and Lilly Pullman, all of Florida; six grandchildren, and three great-grandchildren.