The Manor driver was on the racing line when Joloyon Palmer - on a flying lap - was forced to take evasive action, compromising his lap.
"At the end of the Q1 session, the Driver of Car 31 (Ocon) was on a slow lap having aborted his lap previously, while the Driver of Car 30 (Palmer) was on a fast lap," an FIA statement reads.
"Entering the braking area of Turn 4 Ocon stayed on the racing line at the moment when Palmer was approaching, forcing Palmer off the racing line."
"At that time, Ocon was on the radio with his team, who did not inform him of the approaching car. When Ocon did see Palmer, he moved as far as possible to the right to avoid a dangerous situation, but the Stewards concluded these were not mitigating factors, and that Ocon clearly impeded Palmer."
Bahrain International Circuit - Winter testing