In 2015 Marín was selected to compete in three events at the inaugural European Games held in Baku in June. She won a bronze medal in the women's individual competition, reaching the semi-finals after finishing the 72-arrow round in nineteenth place. A loss to Denmark's Maja Jager in the semi-finals relegated her to the bronze medal match, where she defeated Evangelia Psarra of Greece to claim the final position on the podium. Marín's participation in her two other events however proved less successful. The women's team event saw Marín and her teammates Adriana Martín and Miriam Alarcón eliminated in the first round to Belarus, while the progress of her partnership with Miguel Alvarino Garcia in the mixed team competition event stalled at the quarter-finals with a loss to Georgia. The World Archery Championships held in Copenhagen in July also brought little success, with Marín suffering an opening round defeat in the individual competition after failing to resist a comeback from Japan's Yuki Hayashi.