It has been a difficult time for the Belgian, with the Express and Star reporting that he missed the pre-season tour with Austria and has had injuries to contend with this term. But it appears that he may now be back in contention to make his first Premier League appearance of the campaign for Tony Pulis' men.
And Garner has suggested that it could be a fantastic boost for the Baggies to have the former Tottenham man coming back into the fold following the end of the international break.
"Potentially he could be huge for us," he said, as reported by the Express and Star. "His talent is undoubted.
"When he first came to the club, his first four or five games he was exceptional. But he needs to get back to those levels now."
As Garner alluded to, Chadli made an incredible impact for the Baggies following his 2016 move, and ended the campaign with five goals and five assists in the top flight.
Though he may need some time to get up to speed, he would arguably provide some much-needed creativity as the 2-2 draw with Watford last time out was the first time in the league this term that they had scored more than once in a single game.
And if he can get up to speed and make the kind of impact that he made during his first few weeks with the club, then Pulis will surely be delighted to have him back in the ranks ahead of the busy winter period.