GP3 championship leader Luca Ghiotto topped qualifying for the third time from four in 2015.
The Italian narrowly beat Emil Bernstorff, denying the Briton his maiden qualifying pole by just 0.036s.
Ghiotto and Bernstorff took turns leading for much of the session and the latter seemed to get the initiative with his penultimate lap, clearing the opposition by a tenth and a half.
But Ghiotto improved just enough to take the spot back at the chequered flag, leaving Bernstorff with no time to respond.
A last-second lap vaulted Esteban Ocon into third, with Marvin Kirchhofer making up an all-ART second row of the grid.
Jimmy Eriksson and Matt Parry have locked out row three for Koiranen, the latter just 0.004s ahead of Alex Palou, whose seventh place is his lowest qualifying result from four GP3 outings.
Antonio Fuoco was the top Carlin in eighth, the reigning teams’ champions’ other drivers Mitch Gilbert and Jann Mardenborough placing 11th and 18th respectively.
Series veterans Kevin Ceccon and Pal Varhaug made up the top ten.
Alfonso Celis, teammate to Kirchhofer and Ocon, was the only one not to set a time, backing out of what would be his only flying lap midway through the session.
Full results to follow