Kalember was a member of the Yugoslavia national basketball team that participated at the 1947 European Championship in Prague, Czechoslovakia. He played one game in the tournament without any records. He was a member of the team at the 1950 FIBA World Championship in Buenos Aires, Argentina. Over four tournament games, he averaged 4.5 points per game. Kalember was a member of the national team at the 1953 European Championship in Moscow, the Soviet Union. Over four tournament games, he averaged one point per game.