A move to Europe followed in 2018, as Varrone joined the V de V Challenge Monoplace, first driving for Inter Europol Competition before switching to TS Corse.

In a 2019 season plagued by monetary concerns, Varrone took part in three rounds of the BRDC British Formula 3 Championship with Hillspeed, where he was able to win the reversed-grid race at Spa-Francorchamps.

After being forced to stop his British F3 campaign, Varrone returned home to Buenos Aires, thinking that he would have to abandon his racing career to work in the family business.

[7] In 2021, Rinaldi paired Varrone with Alexander Matschull for the entire Le Mans Cup season, where three podiums earned the duo third place overall.

[17][18] Varrone would soon find another drive, joining reigning 24 Hours of Nürburgring winners Frikadelli Racing for the 2024 event together with Luca Ludwig, Daniel Keilwitz, and Felipe Fernández Laser.