Andersson attended their camp earlier in the summer. Kylington and Ollas Mattsson did not attend that camp.
It looks like they only had 3 players (no defencemen) who attended both the summer camp and the Four Nations tournament. Most of the players who are playing in North America attended the earlier camp (at the time the invites were sent out, they probably assumed Kylington would still be playing in Sweden this season).
Summer Camp Roster:
http://www.swehockey.se/ImageVaultFi...g_2-7_2015.PDF
Four Nations Roster:
http://www.swehockey.se/ImageVaultFi...28-30_2015.PDF