Hector Luisi, who twice served as the Uruguayan ambassador to the United States, died Aug. 5 at his home in Bethesda. He was 93.

The cause was complications from spinal stenosis and hypertension, said a granddaughter, Virginia Ruebensaal.

Mr. Luisi was appointed ambassador to the United States in 1969. He resigned in protest in 1973 when the Uruguayan government was overthrown by the military.

He remained in Bethesda, where he had been living at the official ambassador’s residence, and returned to private law practice for the firm he helped found in 1949, Nin, Luisi and Zunino. He was re-appointed ambassador in 1985 when the military dictatorship ended, and he retired in 1989.

Hector Angel Luisi, a native of Montevideo, became an American citizen in 1998. He was a 1942 graduate of the University of the Republic law school in Montevideo and in 1944 received a diploma in comparative legal studies from St. John’s College of the University of Cambridge in England.

Mr. Luisi entered politics in the 1960s as chief adviser to the late Uruguayan president Diego Gestido. He was one of the authors of reforms to Uruguay’s constitution in 1966. Before serving as an ambassador, he was Uruguay’s minister of foreign affairs and was also elected to the Uruguayan senate in 1967. He taught law at the Alfredo Vasquez Acevedo Institute in Montevideo from 1940 to 1965.

He was a member of the Metropolitan Club in Bethesda and the Chevy Chase Club.

His wife of 62 years, the former Blanca Grosso, died in 2011. Survivors include two children, Blanca Ruebensaal and Hector Luisi, both of Bethesda; six grandchildren; and one great-grandson.

— Trishula Patel