In the 2018–19 UEFA Youth League, Baró scored six goals in ten appearances as Porto won the title. In the final, he assisted Afonso Sousa for the last goal of a 3–1 win over Chelsea in Nyon, Switzerland.[4] With the B-team in the second division, he scored four goals in 28 games over the season, and was sent off for dissent on 1 September 2018 in a 2–1 home win over Académico de Viseu FC.[5]
Baró was given the first team's number 8 shirt ahead of the 2019–20 season, inheriting it from Yacine Brahimi.[6] He made his debut in the UEFA Champions League third qualifying round first leg on 7 August, starting in a 1–0 win away to FC Krasnodar and making way for Luis Díaz on 55 minutes.[7] Ten days later he played his first game in the Primeira Liga, again starting a 4–0 home win against Vitória FC.[8]
Baró has represented Portugal at various youth levels.[10] At the 2021 UEFA European Under-21 Championship, where Portugal finished as runners-up to Germany, he appeared in quarterfinal and semifinal games.[11]
^Romário Baró at Soccerway. Retrieved 21 October 2022.
^Almeida, Isaura (29 April 2019). "FC Porto é campeão Europeu Sub-19" [FC Porto are Under-19 European champions]. Diário de Notícias (in Portuguese). Retrieved 1 May 2019.