On 4 February 2019, after Masouras was underutilized by manager Pedro Martins, he was allowed to join Panionios on loan for the remainder of the season.

On the edge of the penalty area, the Olympiacos loanee thumped an unstoppable attempt into the top right corner to give Panionios the lead within seven minutes.

On 26 August 2020, as Masouras was not in the plans of Olympiacos' coach Pedro Martins, he was sent on loan again, this time joining Ekstraklasa club Górnik Zabrze until the summer of 2021.

[10] On 10 February 2024, Kazakhstan Premier League club Astana announced the signing of Masouras from AE Kifisia to a two-year contract.

[11] On 7 June 2024, Astana announced that Masouras had left the club by mutual agreement after failing to adapt to life in Kazakhstan.