He signed on loan with Major League Soccer side Montreal Impact on 22 February 2017.
[3] In the summer 2019, Arregui joined Colombian club Independiente Medellín on a one-year loan from Temperley with an option to buy.
Independiente Medellín confirmed on 30 December 2019, that they had triggered the option and bought 100% of the Arregui's rights.
[5] However, the spell was cut short, as he on 18 February 2021 instead was transferred to fellow league club Independiente, once again on loan, until the end of the season, with a purchase option.
[6] Arregui was recalled in June 2021 due to a meniscal injury, which prevented him from playing, and returned to Independiente Medellín.