John Albert Edward Orloski, 97, a retired Foreign Service officer and an advocate for the mentally disabled, died Aug. 15 of a stroke at Holy Cross Hospital in Silver Spring. He was a longtime resident of University Park.

Mr. Orloski was born in Scranton, Pa., and graduated from the Georgetown University School of Foreign Service in 1934. He went to work for the Agricultural Adjustment Administration in 1934 and joined the Latin American Division of the old Bureau of Foreign and Domestic Commerce in 1938.

In 1945, he was assigned to the U.S. Embassy in Cuba, serving first as commercial officer and later as assistant commercial attache. He was later assigned to the embassy in La Paz, Bolivia, as commercial attache. He returned to the Department of Commerce International Division in 1948 as chief of the north and west coast areas of South America.

In 1950, Mr. Orloski joined the management consulting firm of Klein & Saks. He was a senior industrial consultant with the firm until 1965, when he joined the consulting firm of Economic Associates. He was based in Washington with both companies.

In 1965, when the Industrial Development Organization of the United Nations was being set up in New York, he joined the organization as senior economic adviser. He was later assistant to the director of the policies and planning division. He continued in that capacity when the organization moved to Vienna, Austria.

Following his assignment in Vienna, he took on specific field assignments for the U.N. organization. He headed a three-person economic mission to Swaziland in 1970 and worked with the government of Mauritius in 1971 and with the government of Guatemala in 1976. He returned to the United States in 1976 after a devastating earthquake in Guatemala.

For many years, Mr. Orloski and his wife, whose daughter Jewel was mentally disabled, were active in promoting public acceptance of people with mental disabilities and a greater public awareness of their needs. He assisted in establishing the Association of Retarded Citizens of Prince George's County and served as the group's president for four years.

A member of St. Mark's Parish in Adelphi, he worked with Christian Assisted Living for Mentally Retarded Adults, serving as the group's chaplain. He moved to Riderwood Village in Silver Spring in 2002. An active member of the community, he wrote articles for the village newsletter on travel and gardening.

His wife, Estelle Orloski, died in January. His daughter Jewel Orloski died in April.

Survivors include a daughter, Mary Jane Phillips of Silver Spring.