Several other players, including Jamieson, who has now signed a two-year contract with Western Sydney Wanderers, have been released from the remainder of their Perth deals in the wake of the club's salary cap cheating drama, but the club continues to refuse to release Maclaren.
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Jamieson headed to Wanderland
Jamieson said the clear message from the club in recent months was that any player who didn't want to stay could leave.
"There were numerous player meetings, collectively as a team and as individuals, where we were told by (Perth coach) Kenny Lowe that any player who was unhappy, the club won't stand in their way of leaving," Jamieson said on Sunday.
"That was the message relayed many times.
"I was confused because the club was saying that, but now they're telling another player like Jamie Maclaren that they want to keep him and that they're not going to let him leave. I can't understand that.
"Jamie has been brilliant this year in keeping his head down and working hard, despite unluckily not starting many games. I know he was told on at least two occasions during the season he could leave at the end of the season, so now to be told he can't leave is very strange.
"I'm not too sure what the reasons are for this, but the boy clearly doesn't want to play for Perth anymore and it's come down to because he feels he's been lied to and they haven't looked after him.
"I do think it's unfair because he had one year left on his deal and he was told he could leave. Had he not been told stuff like that, well, then, it's a business.
"But if you're telling the boy for months that he can leave, it's no longer a football thing now, it's a welfare thing because I spoke to Jamie this morning and he's in bits.
"It's becoming an issue now that he's struggling to deal with it all and this isn't just about football, this is crossing into his personal life because he's very upset with the whole thing and how he's been treated.
"I'm actually a bit worried about him, because he's really struggling to cope with the whole issue. He wants to leave and having seen myself leave with no dramas, he's really struggling."
Defender Jamieson, attacker Youssouf Hersi and goalkeeper Danny Vukovic have all been released by Perth despite being contracted beyond the season just ended.
And it is understood defender and captain Michael Thwaite is also free to exit from the rest of his deal if he can find another club.
Perth was barred from competing in the A-League finals series as part of the club's penalty from Football Federation Australia for cheating the salary cap.The penalty cost the players their chance of winning the championship and qualifying for next year's AFC Asian Champions League.
Many of them were angry with the club over what had happened and some consulted with their union, Professional Footballers Australia, to establish what legal options they had.
Maclaren, who sat on the bench for most of the season behind Irish striker Andy Keogh before finishing with a flurry of goals when he started several times in the closing rounds, originally tried to gain a release through mutual consent with Perth.
His request was denied, so with the support of the PFA he served a breach notice against the club based on the material, non-financial clause in the standard playing contract.
Perth had 21 days to respond to the breach notice - a period that runs out on Thursday.
Presuming that Perth maintains its stance, the matter would then go to arbitration under Football Federation Australia rules, where both parties argue their case in a grievance procedure.
Maclaren's manager, Paddy Dominguez, said the player remained determined to follow the matter through.
"I can absolutely, categorically guarantee this is not a situation that in any way was brought about by the player and we have sufficient evidence to demonstrate that at the appropriate time," Dominguez told The World Game.
"Jamie has tried to resolve it amicably as much as is possible, but for whatever reason the club is resolute that the other guys can go but just not Jamie Maclaren.
"Jamie remains confident of his position, mainly because of the support he has from both his team-mates and the fans."
Jamieson is the second of the released Perth players to publicly state their support for Maclaren, after Vukovic spoke out on his behalf in the News Limited media on Sunday.
Meanwhile, 26-year-old Jamieson said he was thrilled to be linking up with the Wanderers in a deal that was announced on Sunday.
"I'm very excited about the future," he said.
"Western Sydney have just come off a very tough season in the A-League, but there were good reasons for that with their heavy schedule in the Asian Champions League as well.
"I've been told by mates who have played there that it's a good environment and I'm looking forward to being coached by Tony Popovic. I want to continue to learn and improve as a player and there is no better coach in the A-League at the moment than him.
"I grew up at Kings Langley, not far from Blacktown, so I'm a real Western Sydney boy and I love the thought of coming home and annoying my mum and dad for a while. I've got an apartment at Top Ryde, so I'll probably split my time between there and the family home to start with.
"I can't wait to get started."
