The French defender joined from Bordeaux on a free transfer this summer while Garvan, who featured in the Eagles' opening two league matches, has been at Selhurst Park since 2010.
But neither player will feature for the south London club after missing out on a place in Holloway's 25-man squad, and the Palace boss says the 25-year-old's reluctance to be a squad players was the reason for his omission.
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"He was really close to being selected. In fact, if it wasn't for a conversation we had the week before, because he wasn't going to be in the starting XI, he would have been in my 25.
"He made it totally clear to me that he didn't want to be in the 25 if he wasn't starting almost every week. I couldn't guarantee him that."
Marange, meanwhile, said he was "disgusted" at his treatment, having been deemed surplus to requirements only weeks after joining the club, but Holloway did not believe the Frenchman was cut out for the Premier League
"I didn't want his family coming over here if he wasn't exactly the player we thought he was going to be," Holloway continued.
"It's as simple as that. I needed some pace in that backline and he hasn't got it.
"We brought him in during pre-season, I have had a look at his record and thought he would be fine but in two games he didn't look quick enough. If he doesn't like it, I can't help that.
"His agent knew three or four days before the window shut. So he could have got him a French club, so why didn't he?"