Board Thread:Questions and Answers/@comment-27545423-20160203222642/@comment-25669979-20170203064502

According to Emily Atkinson on OppTrends (http://www.opptrends.com/2017/01/seraph-of-the-end-season-3-release-date/), each season of the anime has tweleve episodes and those episodes adapted twenty to twenty-one of the chapters in the manga. Thus she speculates that there should be eight (soon seven) more chapters released monthly for another season, and accounting the time needed to adapt these chapters into episodes and having them animated... Seson 3 can come as early in winter 2018.