At the end of the 2014–15 Luxembourg National Division, his contract expired and he considered offers from China and Armenia but opted to remain in Western Europe, having trials at Germany's FC Erzgebirge Aue and SSV Jahn Regensburg before signing for FC Victoria Rosport in January 2016.

[14] After over four years without a cap, Karapetyan was recalled in November 2018 ahead of UEFA Nations League away games at Gibraltar and Liechtenstein.

[15] He scored his first international goal to complete a 6–2 UEFA Nations League win against the former on 16 November,[16] and struck again three days later to ensure a 2–2 draw against the latter.

[17] In June 2019, Karapetyan scored in consecutive games to win UEFA Euro 2020 qualifiers against Liechtenstein and Greece.

On 5 August that year, he netted again to give Armenia a surprise lead at home to Italy in the next game of the campaign, but was sent off before half time in a 3–1 loss.