Kazuma Miki Dengeki Bunko editor at the Dengeki Bunko Autumn Festival 2017 event in Tokyo announced Kazuma Kamachi's light Novel series, A Certain Magical Index will receive a 3rd season that will air in 2018.
A Certain Magical Index Season 3 PV
Dengeki Bunko editor Kazuma Miki also announced the "A Certain Project 2018” at the Dengeki Bunko Autumn Festival 2017 event, Where they mentioned A Certain Magical Index isn’t the only series part of this project/series that will receive a new season
Set in a city of not only scientifically advanced superhuman students, but in a world where magic is also real. Kamijyo Touma's right hand, the Imagine Breaker, will negate all magic, psychic, or divine powers, as well as his own luck.
One day he finds a young girl hanging on his balcony railing. She turns out to be a nun from the Church of England, and her mind has been implanted with the Index Librorum Prohibitorum—all the magical texts the Church has removed from circulation.