In Macau Grand Prix he started the race from the front row but collided with Raffaele Marciello and Pipo Derani to retire in the first lap.

In his fourth year with Mücke Motorsport, the Swede finished eighth in the 2014 European Formula 3 Championship in a disappointing campaign.

He ended the year with a very welcomed win in the 2014 Macau Grand Prix from pole position ahead of teammate Lucas Auer

In 2015 he switched to Prema Powerteam, claiming the 2015 European Formula 3 Championship title with 13 victories, 24 podiums, and 17 pole positions.

Rosenqvist joined the 2016 Blancpain GT Series Sprint Cup together with French Tristan Vautier, driving a Mercedes-AMG GT3 for AKKA-ASP Team where they together scored 1 victory, 3 podiums out of the 10 races and finished 7th in the overall standings.

The same duo together with Renger van der Zande lined up for the classic 2016 24 Hours of Spa where they reached 2nd place after all Mercedes-Benz cars have been given a 5-minute stop and go penalty.

He made an impressive debut in Moscow where he finished 10th and scored points in his first-ever race in the Deutsche Tourenwagen Masters.

[9] On 13 October 2020 it was announced Rosenqvist would leave the team and join Arrow McLaren SP in 2021, replacing Oliver Askew in the organization's No.

Rosenqvist was released the following day from the hospital but was not cleared to participate in the second Detroit race nor the following round at Road America a week later.

(Races in bold indicate pole position) † Rosenqvist did not complete sufficient laps in order to score full points.