The final race of the Spa-Francorchamps weekend is due to start at 10.30 local time (09.30 UK), with the top-12 drivers from the combined qualifying result reversed on the grid.
The reversal puts Zandvoort race winner Hugo Schwarze on pole position for VRD Racing. The German driver has already claimed a podium finish so far this weekend, and has the chance to claim another piece of silverware this morning, starting alongside JHR Developments' Kai Daryanani on the front row.
Row two is formed by Xcel Motorsport's title contender Patrick Heuzenroeder and the second JHR car of Noah Lisle, with Heuzenroeder's teammate Dion Gowda and Elite's Will Macintyre on row three.
Keanu Al Azhari is the lead Hitech machine in seventh ahead of Hillspeed's Hiyu Yamakoshi, with Rodin's race one winner Alex Ninovic and Hitech's Nikita Johnson completing the top-10.
Rodin's Gianmarco Pradel and Hillspeed's race two winner Kanato Le complete the top-dozen on the grid. The full race three line-up is shown below.
GB3 Championship, partnered by the BRDC, race three grid:
1. Hugo Schwarze, VRD Racing
2. Kai Daryanani, JHR Developments
3. Patrick Heuzenroeder, Xcel Motorsport
4. Noah Lisle, JHR Developments
5. Dion Gowda, Xcel Motorsport
6. Will Macintyre, Elite Motorsport
7. Keanu Al Azhari, Hitech TGR
8. Hiyu Yamakoshi, Hillspeed
9. Alex Ninovic, Rodin Motorsport
10. Nikita Johnson, Hitech TGR
11. Gianmarco Pradel, Rodin Motorsport
12. Kanato Le, Hillspeed
13. Abbi Pulling, Rodin Motorsport
14. Yuanpu Cui, Argenti with Prema
15. Reza Seewooruthun, Argenti with Prema
16. Jack Sherwood, Xcel Motorsport
17. Flynn Jackes, Elite Motorsport
18. Stefan Bostandjiev, Fortec Motorsports
19. Lucas Fluxa, Argenti with Prema
20. Bianca Bustamante, Elite Motorsport
21. Divy Nandan, JHR Developments
22. Deagen Fairclough, Hitech TGR
23. Freddie Slater, Hillspeed