Third season
.
http://vyzhit-posle.ru/o-seriale
Google translation:
https://translate.google.com/translate?sl=auto&tl=en&js=y&prev=_t&hl=en&ie=UTF-8&u=http%3A%2F%2Fvyzhit-posle.ru%2Fo-seriale
According to the information there,
the third season was filmed from July to September 2015.