In an attempt to regain fitness, Guarente was sent on loan to Serie A outfit, Bologna for the 2012–13 Serie A season, with an option to purchase outright. Bologna turned down the option to sign Guarente on a permanent basis following his 20 appearances. On 29 August 2013, Guarente was officially sent to Calcio Catania on another season-long loan deal in the Serie A. Catania will also have the option to purchase the player outright following the conclusion of the 2013–14 Serie A campaign. On 31 January 2014, he moved to Chievo Verona.