Verstappen showed the best time of the day - 1 min 59.765 sec.
The second was Williams Racing driver George Russell (0.321 s lag).
The top three were closed by Briton Lewis Hamilton from Mercedes (0.334 s).
Russian Haas racer Nikita Mazepin finished 20th, second behind his teammate Mick Schumacher, who showed 18th place.
The Belgian Grand Prix takes place at the Spa-Francorchamps circuit.
The race will take place on August 29th.
The Formula 1 administration has postponed the stages of the Grand Prix of Turkey, Mexico and Brazil.