Although it was announced shortly after the session that no further investigation would be needed, the incident summed up Stroll and Aston Martin's poor start to the weekend, where they have looked off the pace at the Autodromo Hermanos Rodriguez.
The incident surely would have been a slamdunk penalty if it had taken place in qualifying, with Sainz completely ruining his tyres, and almost being collected by the barriers after spinning whilst trying to avoid Stroll.
Sainz rages at Stroll
The Spaniard wasn't the only Ferrari driver who was left feeling aggrieved during the session.
Charles Leclerc also felt he was impeded, by Haas' Kevin Magnussen who admitted over his team radio that he hadn't seen the Monagasque driver, attempting to blame his engineer for not letting him know he was there..
Neither Stroll nor Magnussen will pay the price for the FP3 incidents, but Sainz was left unimpressed by Stroll's inability to get out of his way.
“This guy. Honestly, this guy," he complained.
"If that’s not a penalty. He couldn’t do that in Practice.”
GPFans is a multi-platform, multi-language brand dedicated to Formula One coverage. We bring you all the ins and outs of the sport, 24/7, everything from up-to-the-minute news and features to the latest viral stories and clips.
We believe that a new generation of exciting, outspoken drivers will make F1 more popular than ever before, and we want to give our users access to as much of their heroes as possible, on and off the track. From Lewis Hamilton to Max Verstappen, Daniel Ricciardo to Sebastian Vettel, we provide in-depth analysis of every every Grand Prix in the season, from Australia to Abu Dhabi.
With Formula One under the new ownership of Liberty Media, how the sport is being covered is evolving, and GPFans will look to be at the heart of this progression into new media, as one of the fastest-growing sites covering the king of motorsports.