From ANN
"A flyer inserted into newly published books from MF Busho J, the light novel imprint owned by the production company Media Factory, has announced that a third television anime series has been greenlit for the Zero no Tsukaima fantasy comedy franchise. The announcement was made in conjunction with the 13th volume of the light novels, which are written by Noboru Yamaguchi and illustrated by Eiji Usatsuka. The 13th volume, Seikoku no World Door, will be released on December 20"
I hope it will be better than the second season
YAY! *throws confetti in the air* I luv Zero no Tsukaima!
Even Alucard is happy! Look he's smiling
(https://forums.fanime.com/proxy.php?request=http%3A%2F%2Fi149.photobucket.com%2Falbums%2Fs50%2FMighty147%2FcoolnessAlucard2.jpg&hash=24b5c003aba2c2f87e7d46815635e8c34d050773)