John W. More, 63, a retired Foreign Service officer with the Agency for International Development, died of cardiorespiratory arrest Monday at Mount Vernon Hospital.

His last assignment, from 1968 to 1972, had been that of a developing training specialist with the Near East-South Asia-Africa branch and the East Asia-Vietnam branch of the population and family planning staff in the office of international training.

Mr. More was born in Lead, S.D. He earned bachelor's and master's degrees from Syracuse University, and was a Rhodes scholar at Oxford University in 1939.

He also attended Harvard University, the John Hopkins University School of Advanced International Studies and Boston University.

He served as a naval officer in World War II and joined the U.S. Bureau of the Budget in 1947 where he became assistant chief of the foreign technical assistance group.

In 1953, Mr. More became assistant chief of the training branch in the public administration division of the Foreign Operations Administration, one of the forerunners of AID.

Three years later, he went to Bangkok as chief of the public administration division of the U.S. Operations Mission to Thailand. He held a similar position with the U.S. Operations Mission to Liberia during 1960-64. In each country he was an advisor to the heads of government.

During the next four years, he was public administration advisor in Nairobi, Kenya, and chief of plans in the office of international training of AID in Washington. He also was a public administration consultant to the Vietnam Bureau of AID.

Mr. More was a Mason. He was a member of the American Public Administration Society and the Army Navy Country Club.

He is survived by his wife, Frances Swann More of the home in Alexandria; four children, Alan, of McLean, Syver, of Tucson, Ariz., Bonnie Knold, of Denver, and Jan, of Washington; two stepchildren, James Rosser of Greenville, Tex., and Patricia Clements of Texarkana, Ark., and a sister, Jean Hudah.