The question about 'Vampire Knight' season 3 hits a specific nerve for fans because it touches on the blend of anticipation and confusion that comes with long-unresolved adaptations. That third season is a bit of a legendary non-starter in anime circles; while the original manga by Matsuri Hino concluded years ago, the anime adaptation wrapped with its second season. There's been no official announcement, production, or release of a season 3 from any studio or distributor. So, any site claiming to offer HD downloads for it is almost certainly hosting misleading content, perhaps mislabeled clips, fan edits, or worse, malware.
If you're craving more from that universe in a visual format, your genuine pathways are pretty clear. You could revisit the existing two seasons, now available in crisp quality on various legal streaming platforms, which is the safest and most supportive route. For new narrative material, diving into the complete manga is the definitive move—it covers the entire story arc the anime couldn't reach. Sometimes, the hunger for more of a series leads us to search for what isn't there, but in this case, the original source material holds everything the anime left behind. I still check for news every now and then, hoping for a surprise revival, but I'm not holding my breath.