Ocon was losing ground on his fading soft tyres when Hulkenberg tried to pass him on the exit of Turn 1, and Perez in turn drew alongside the Haas as they approached the Turn 2 left-hander.
With Ocon on the inside, Hulkenberg was caught in a sandwich between the two cars. After contact from the Haas, Ocon was sent spinning across Hulkenberg's bows and into Perez's Red Bull.
Perez and Ocon ended their races in the gravel trap, while Hulkenberg was obliged to retire after getting his damaged car back to the pits.
“It was wrong place, wrong time,” said Perez, who will start Sunday's Grand Prix from 13th, when asked by Autosport about the incident.
“The race didn't start particularly well because we were on the medium tyre, it was very low grip to start the race on that tyre.
“We were recovering, we were making good progress, but unfortunately as I was making more progress we had this contact and I paid the price, I had massive damage on my car.
"It's been a very frustrating day, but tomorrow it's a new opportunity and we will give our best.”
Ocon said he didn’t know that Perez was alongside Hulkenberg as he tried to defend his position and labelled the crash a racing incident.
“We had the soft tyres, so we started very well,” said Ocon. “We made up some good places from P10 to P7, some good fights with Fernando [Alonso] also.
Source: Autosport