In 2019 he joined the national team for the 2019 World Men's Handball Championship in Germany and Denmark. He was Croatia's top scorer in the inaugural match against Iceland, in which he was also named man of the match, receiving the award from Niko Kovač, and in the Fifth place game that Croatia lost to Sweden. Overall, Stepančić was Croatia's second top scorer in the competition with 31 goals after Zlatko Horvat with 39. Croatia ended the competition 6th, after losing the Fifth place game to Sweden on January 26, 2019.