In May 2021, it was reported that Pašalić would join Borussia Dortmund II, which had just been promoted to the 3. Liga as Regionalliga West champions.[6] After he scored two goals in three third-division games, coach Marco Rose called him into the squad of Borussia Dortmund for the 2021 DFL-Supercup. Pašalić entered as a substitute in the final phase of the 3–1 defeat against Bayern Munich.[7] A month later, on 5 September, he suffered a torn syndesmosis ligament in a 1–0 away win over TSV Havelse,[8] and was out until the end of January 2022. After his return, Pašalić sustained a shoulder injury in March which sidelined him for the remainder of the season.[9] Afterwards that year, on 8 November, he made his Bundesliga debut for Borussia Dortmund under coach Edin Terzić in a 2–0 away defeat against VfL Wolfsburg.[10]
Pašalić made appearances for the Croatian youth national teams of U17, and U21.
On 18 November 2023, Pašalić made his senior debut for Croatia in a 2–0 away win against Latvia during the Euro 2024 qualifying.[13] On 20 May 2024, he was selected in the 26-man squad for the UEFA Euro 2024.[14] A few weeks later, on 3 June, he scored his first international goal in a 3–0 friendly victory over North Macedonia prior to the tournament.[15]
