The Japanese Grand Prix has been suspended after just three laps due to the increasing wet conditions.
Only the first half of the start took place under racing conditions, with Carlos Sainz crashing out after aquaplaning off on the exit of Spoon Curve.
Rain was predicted to hit the circuit overnight, with showers intensifying on the run up to the race start.
Only two full race laps are required for any points to be awarded, which has been fulfilled so far.
FIA said in a statement: "Red Flag due to worsening weather conditions and recovery operations required on track. Restart time will be confirmed by Race Control."