User blog comment:Jesika H/Season 3?/@comment-4866818-20120620193042

There is a reference found on Vampire Knight Destiny, taken from the Madman Entertainment website, but so far I cannot find much about the validity on that. Apparently though, the new season will premiere in October this year; however, no news from the original Japanese studio producing Vampire Knight, called Studio Deen, has made word of this. Since there doesn't seem to be any other sources to confirm the validity of the new season, this is considered speculation.

If anything new from the network or from Matsuri Hino confirms this new season, then it will be official.