His second round tie with Mark Webster at the 2017 World Championship went to a deciding set in which Webster won all three legs to eliminate Suljović 4–3. Suljović got through to the final of the Gibraltar Darts Trophy after Daryl Gurney missed four darts to beat him in the semi-finals. In the final Michael Smith was 3–0 up, before Suljović took four legs in a row. He was waiting on 56 at 4–4, but Smith completed a 132 finish and won the next leg to defeat Suljović 6–4. Austria played England in the quarter-finals of the 2017 World Cup for the second successive year. Suljović thrashed Adrian Lewis 4–0 and Rowby-John Rodriguez lost 4–1 to Dave Chisnall, before Austria were defeated 4–2 in the decisive doubles match.