What is currently happening in Vampire Knight manga and will there be a 3rd season in the anime?

No one knows if there will be a 3rd season but if you go to manga reader they are updated the quickest. Currently, Yuki is back at the school an restarted the Night Class and has more interactions with Zero. Also, Kaname isn't present in the recent chapters but Yuki is continuing with her role as the death bringer for the vampires. But based on the trends for the anime the next season would need more material for another season to be produced because each season has been based on 5 volumes, so wait a little a new season may be coming on top of that there are a TON of fans so i believe there will be another season! =D