In June 1951, Marjanović played two games for Crvena zvezda at an international cup tournament in Milan, Italy.
On 18 June, he recorded 10 points in a 46–35 loss to Borletti Milano.
On the following day, he recorded 17 points in a 54–24 win over Ginnastica Roma.
[1] Marjanović was a member of the Yugoslavia national basketball team at the 1947 FIBA European Championship in Prague, Czechoslovakia.
[3] Marjanović was a Yugoslav team member at the 1954 FIBA World Championship in Rio de Janeiro, Brazil.