The 33-year-old made the switch from Camp Nou to Stamford Bridge in last year's summer window but has struggled to hold down a place in the Chelsea side, featuring in only 18 matches so far this season.
Having played just seven minutes of football for Graham Potter's men since the January transfer window shut, the Gabon international has fallen behind the likes of Joao Felix and Mykhaylo Mudryk in the Blues' attacking pecking order.
According to the Evening Standard, Barcelona are hoping to re-sign Aubameyang on a free transfer this summer and agree a deal involving reduced wages with the player as the Catalan club continue to battle with their financial issues.
The report adds that the attacker has potential suitors across Europe, with Atletico Madrid and Champions League quarter-finalists AC Milan also interested in the ex-Arsenal man.
Aubameyang was pictured celebrating inside the Barcelona dressing room following their victory over Real Madrid in La Liga on Sunday night, just a day after he was left out of Chelsea's squad for their 2-2 draw at home to Everton.
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