Verratti, 24, has been linked with Premier League sides Chelsea and Manchester United, with Italian outlet Calcio Mercato claiming Juventus and Bayern Munich are also interested in the midfielder.
But the Italy international, who has also been linked with a move to Inter Milan, says Barca are the only choice for him other than PSG.
“Even though I am currently in a good project and I feel at home, any player would play for Barcelona,” Verratti told AS.
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“It is still the best team in the world.
“They have the three best players in attack, and Iniesta too.
“Iniesta, Messi and Neymar create a move in a second.”
Marco Verratti says he would only leave PSG to join Barcelona
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Manchester United and Chelsea reportedly want to sign Verratti
Verratti's PSG face Barcelona tomorrow
Chelsea were first linked with a move to Verratti last summer when manager Antonio Conte was seeking to bring midfielders to the club.
But the Italian boss instead moved for Leicester's title winner N'Golo Kante.
United, meanwhile, already had an agreement to sign Henrikh Mkhitaryan by the time manager Jose Mourinho was appointed in the summer.
Verratti is expected to start for PSG when they play Barcelona in the first leg of their Champions League last-16 tie tomorrow (7.45pm).