Tomasz Cywka has reportedly rejected a new contract at Barnsley and will now leave the Yorkshire club this summer.
The Pole's current deal expires later this month and recently-relegated Barnsley were keen on securing his future.
However, according to Sky Sports News, the two parties have failed to reach an agreement and the 25-year-old will now be after a new club.
He scored nine goals in two seasons with the Tykes after joining them from Reading in 2012.