Further heavy rain at the Circuit of the Americas has led to the Saturday afternoon qualifying session being delayed until Sunday morning.
Officials gave the weather as much time as they could to clear up, but persistent heavy downpours and a saturated and flooded circuit meant getting cars on track was impossible.
The weather had already seen the cancellation of second practice on Friday, while Saturday morning’s third practice was held in extremely wet conditions that saw a number of drivers running off track due to issues with aquaplaning.
Although more rain is forecast for Sunday morning, it is expected to be far lighter than what was seen on Saturday, which would allow the qualifying session to finally be run.
The session is scheduled to run at 9am local time, meaning there would only be a four hour gap between its conclusion and the race start, with drivers set to leave the pit lane to join the grid half hour earlier at 1:30pm local time.