His career was briefly interrupted with World War II. When his native island was occupied by fascist Italy, he was interned on Italian mainland. After capitulation of Italy, he came to El Shatt refugee camp where he made contacts with Tito's Partisans.
After the war Marinković spent time working in theatre.
His best known works are Glorija, play in which he criticised the Catholic Church, and Kiklop, semi-autobiographic novel in which he describes gloomy atmosphere among Zagreb intellectuals before the Axis invasion of Yugoslavia. The latter was adapted into 1982 movie directed by Antun Vrdoljak.
He died in Zagreb.