Samaras, 30, racked up almost 250 appearances for Celtic during a six-and-a-half year spell with the Glaswegian giants, before leaving for West Brom last summer.
The Greek international joined West Brom on a free transfer almost a year ago, but he managed just eight appearances for the club, failing to find the back of the net.
The forward was then loaned out to Saudi Arabian side Al-Hilal in January, but that spell didn't reap much for the former Manchester City flop either.
Now, the Birmingham Mail report that West Brom have told Samaras that he is free to leave the club this summer, with manager Tony Pulis shaping his own squad at The Hawthorns.
Could Samaras return to Celtic?
Samaras enjoyed a productive spell with Celtic, and manager Ronny Deila is in the market for an attacking player this summer as the Bhoys gear up for the Champions League qualifiers.
A return is unlikely, but Samaras' agent Gregory Ioannidis recently hinted that Celtic could make a move to bring Samaras back to the club this summer, as reported by Talking Baws.
However, instead of looking to the past in trying to bring Samaras back to Glasgow, Celtic should be looking forward and bringing in a younger player who has been prolific over the past year - and Samaras doesn't fit into either criteria.