Aussie Mil Jedinak will be called up for the Asia Cup while Yannick Bolasie will link up with DR Congo for the Africa Cup of Nations, and Warnock has spent most of the past month making checks on potential new recruits.
Warnock said: "The Australians are hosting the Asia Cup so Mile will probably play the game on January 1 and then go - we'll be without him for three games and that's excluding the FA Cup.
"These competitions are quite ridiculously planned and it's something you don't really want as a manager, but it's a global game and the players love representing their countries. We just have to get on with it.
"But we are looking and we are going to try to improve the squad early in January.
"I don't want to leave it until the last minute of the deadline.
"It's not an easy time to get players in. I know last year Palace did well with recruitment, bringing Joe Ledley in and one or two others and that was part of the reason why they went on such a good run.
"We want to have that sort of an impact again this year to supplement the squad, especially with the lads you're talking about.
"We've got people going mostly to Europe but even to Africa, too. We're looking at a lot of games, a lot of players.
"And as you can imagine, every agent who speaks to you claims their player is the best thing since sliced bread."
For the big stories and the banter follow us on Twitter: @tribalfootball