But they could make moves in January to help the second half of the season.
Betfair reckon their most likely signing is PSG ace Adrien Rabiot, following by Ajax youngster Mattijs de Ligt.
However there is also a chance of moving for Liverpool striker Roberto Firmino - which will worry Reds fans.
Barcelona had to agree to a 'Coutinho tax' after signing the Liverpool was in January - meaning they have to pay an extra £100m on top of the market value for any Liverpool player.
Barcelona transfer news: Ernesto Valverde is plotting January moves (Image: GETTY)
Barcelona transfer news: Roberto Firmino is on Barcelona's radar (Image: GETTY)
Barca have also been linked with Manchester United star Paul Pogba, although since the change in manager at Old Trafford that has become more unlikely.
Betfair are still offering 20/1 on a deal though.
Pogba starred as United beat Cardiff last week under Ole Gunnar Solskjaer but was ready to quit the club under Jose Mourinho.
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Barcelona ace Messi and Paul Pogba spotted together in Dubai
Barcelona top five most likely signings - provided by Betfair