Turan signed a five-year deal with the La Liga champions last month but cannot play until January due to the FIFA transfer ban imposed on the club.
Barcelona cannot actually register Turan as an official Barcelona player until the turn of the year. The bearded winger has yet to receive a squad number as a result – although he would like the number 14 shirt currently occupied by Mascherano.
Turan has expected to leave on loan but Luis Enrique is keen on his star signing staying and adapting to the Barcelona way.
The Turkish international is permitted to train with the team but cannot play any competitive games including friendlies for the Champions League title holders.