Born in San Lorenzo, Paraguay, Sanabria started his career in futsal, later moving to football.

[4] In 2007, he and his parents moved to Spain, and he joined a local club from Sitges, called La Blanca Subur CF.

[7] On 29 September he made his professional debut, playing the last 22 minutes in a 0–1 home loss against RCD Mallorca.

[13] Sanabria made his Serie A debut on 23 March, replacing Davide Biondini in a 0–1 loss at Udinese.

[18] On 8 February 2015, Sanabria made his first team debut for Roma, replacing Francesco Totti after 62 minutes, in the 2–1 Serie A victory against Cagliari.

[19] On 11 August 2015, Sanabria returned to Spain after agreeing to a one-year loan deal with La Liga side Sporting Gijón.

[28] Sanabria was selected as part of Paraguay's Copa America Centenario squad, where he made two appearances.