Barceló was born in Florida, Uruguay.[2] He came through the youth system at Montevideo-based club Liverpool,[3] and made his first-team debut on 24 February 2013, aged 19, as a second-half substitute in a 1–0 opening-day defeat against Danubio in the Primera División.[4] He scored his first goal in his fourth appearance, in a 3–3 draw away to Bella Vista,[1] and in the next match, he scored a hat-trick to help his team beat River Plate 4–2.[5] He finished the 2012–13 Clausura with five goals from twelve appearances, which made him the club's joint top scorer (with Paulo Pezzolano).[6]
He scored six goals in the 2013–14 season,[1] which ended in relegation to the Segunda División.[7] After scoring once from five substitute appearances in the first half of the following season,[1] Barceló joined El Tanque Sisley on a six-month loan.[8] He played eleven matches and scored once,[1] in a 4–2 defeat of Atenas on the final day of the 2015 Clausura; the result confirmed that El Tanque Sisley stayed in the Primera and their opponents were relegated.[9]
In his absence, Liverpool had won the 2014–15 Segunda División title and returned to the Primera.[10] Barceló made seven appearances (one start) in the 2015 Apertura, but in January 2016 he was allowed to leave for another Primera team, Juventud de Las Piedras.[11] He made a scoring debut on the opening day of the campaign against Danubio, albeit in a losing cause, when a shot hit the crossbar and he headed home the rebound,[12] scored again the following week with a penalty awarded when he himself was fouled,[13] and finished the season as the club's top scorer with six goals from eleven appearances.[14]
^"Pezzolano pidió perdón en emotiva carta" [Pezzolano begs forgiveness in an emotional letter]. Referí (in Spanish). Montevideo: El Observador. 20 May 2014. Retrieved 9 March 2018.
^Bachs, Martín (8 January 2016). "Juventud: Llega Facundo Barcelo" [Juventud: Facundo Barcelo arrives] (in Spanish). Tenfield. Retrieved 9 March 2018.
^Castro, Eduardo (8 February 2016). "Debut que mereció mejor suerte" [Debut that deserved better luck] (in Spanish). Club Atlético Juventud de Las Piedras. Retrieved 9 March 2018.
^Olascuaga, Joselo (14 February 2016). "Rentistas de atrás, 2:1" [Rentistas from behind, 2–1] (in Spanish). Tenfield. Retrieved 9 March 2018.