Xcel Motorsport's Lucas Fluxa claimed his first win of the season in the final race of the weekend at Brands Hatch, while a disastrous race for VRD's championship leader Nikita Bedrin means the championship fight will go all the way to Barcelona, with three other drivers still in contention.
Fluxa made a lightning start from fourth on the grid, blasting into the lead on the run to Paddock Hill Bend, and led every lap from there to keep his slim title chances alive.
Hitech's Yuhao Fu claimed his first GB3 podium with second place, while Fu's teammate Kanato Le claimed a podium on his GB3 return by passing Hillspeed's Dante Vinci on lap 13.
Vinci had to settle for fourth ahead of pole sitting teammate Peter Bouzinelos, who finished fifth on the road, but dropped down the order after picking up a pair of track limits penalties.
Having dominated the first two races, Hitech's Deagen Fairclough was in spectacular form again, as he climbed from 12th to fifth in the amended classification, and with a handful of spectacular overtakes included, including a late dive at Paddock Hill on Maxim Rehm.
Meanwhile, Bedrin had a combative race, but scuppered his chances of taking the title with an event to spare, by moving on the starting grid before the lights went out. He finished seventh on the road after also passing Rehm late on, but dropped down the order to 11th after picking up a 10 second time penalty. That means four drivers head to Barcelona still in title contention, with Fairclough now Bedrin's nearest rival after another sensational weekend.
Xcel's Rowan Campbell-Pilling gained three spots on his way to eighth, while Rodin's Abbi Pulling had a quick start but ultimately finished ninth, while Elite's Flynn Jackes put on a real show as he climbed up from 18th on the grid to complete the top-10.
Bouzinelos' own penalties dropped him to 12th.
GB3 Championship, partnered by the BRDC, Brands Hatch, provisional race three result:
1. Lucas Fluxa, Xcel Motorsport, 19 laps
2. Yuhao Fu, Hitech, +0.844s
3. Kanato Le, Hitech, +1.276s
4. Dante Vinci, Hillspeed, +4.462s
5. Deagen Fairclough, Hitech, +7.069s
6. Patricio Gonzalez, VRD Racing, +10.925s
7. Maxim Rehm, Rodin Motorsport, +11.734
8. Rowan Campbell-Pilling, Xcel Motorsport, +12.368s
9. Abbi Pulling, Rodin Motorsport, +12.775s
10. Flynn Jackes, Elite Motorsport, +13.195s
11. Nikita Bedrin, VRD Racing, +18.525s*
12. Peter Bouzinelos, Hillspeed, +19.854s*
13. Kyuho Lee, Elite Motorsport, +20.394s
14. Martin Molnar, Rodin Motorsport, +20.992s
15. Rodrigo Gonzalez, VRD Racing, +21.468s
16. Edu Robinson, Elite Motorsport, +21.874s
17. Leon Wilson, Arden Motorsport, +22.242s
18. Ricardo Baptista, Xcel Motorsport, +30.225s
19. Aditya Kulkarni, AKCEL GP, +48.604s
DNF. Aurelia Nobels, Hillspeed, 11 laps
*Time penalties