Ozren Nedeljković played for Yugoslavia in 3rd unofficial Chess Olympiad at Munich 1936 where he won individual gold medal on second reserve board. He also represented Yugoslavia in several friendly matches against Switzerland (1947, 1950), Austria (1949), Netherlands (1949, 1950), Sweden (1950), United Kingdom (1951), West Germany (1951, 1952, 1954), Italy (1951, 1953, 1954), and Hungary (1957, 1960).