Naum Ionescu, 82, a retired writer and broadcaster with the Voice of America and a former Romanian diplomat, died Tuesday, at Arlington Hospital after a heart attack. He had lived in Washington for a number of years before moving to Arlington two years ago.

Mr. Ionescu joined the VOA in 1957 and worked in the Romanian section as a writer and broadcaster, specializing in sports. He retired in 1972.

He was born in Sofia, Bulgaria, of Romanian parents, and grew up in Romania, where he graduated with a law degree from the University of Bucharest. He served in the Romanian army in World War I.

For a number of years, he was a sports commentator for newspapers in Romania until entering the Romanian foreign service. He served as a consul in Montreal and Rusciuc, Bulgaria, in the late 1930s.

He later became a secretary to King Michael of Romania and served as liason officer between the monarchy and the foreign ministry. He left Romania with Michael in 1947 when the king was forced to abdicate.He lived in New York City before coming here.

Mr. Ionescu had been a member of the Romanian National Committee in this country and in France.

His wife, Irinel, died 17 years ago.

He survived by a brother, Nicholas, and two sisters, Maria Malaxa and Raina Gulu, all of Romania.