The 10-game limit isn't a thing with Lundkvist.
That's only relevant for slide-eligible contracts and a player can only get a slide eligible ELC if signed in the calendar year of his 18th or 19th birthday. If Lundkvist signs the contract and they have it kick in, it counts regardless of him playing a game (Same as Jones).
But it's irrelevant. The only way he is released is if he requests a release from the national team and I highly doubt that with how much of an honour it is to represent your country at the Worlds, especially for a kid who is just 20 years old