Sebastian Vettel has ended the second practice session from the Hungaroring as the fastest driver, laying down a 1:20.464 in wet conditions.
Rain fell hard in the hour before the start of the session, which led to the cancellation of the Formula 3 qualifying session.
The wet conditions stayed throughout the 90 minutes of running, with a number of drivers option not to take to the circuit in the tricky settings.
Pierre Gasly was sixth for AlphaTauri, but ended the session complaining of smelling something burning at the rear of his car - however he emerged back out onto the circuit after a quick scan was performed by the engineers.
Rain is in the Budapest vicinity on Saturday, and a wet final practice session could unfold ahead of qualifying in the afternoon.
Bahrain International Circuit - Winter testing