Lengkepan kalimah di handap ieu: The 2015 Catalunya GP2 and GP3 Series round was a pair of motor races held on May 9 and 10, 2015 at the Circuit de Catalunya in Spain as part of the GP2 and GP3 Series. Ieu mangrupikeun babak kadua usum GP2 Series 2015 sareng babak kahiji usum GP3 Series 2015. The sabtu minggu balap dirojong
Grand Prix Spanyol taun 2015.