Board Thread:General Discussion/@comment-2602:30A:2E42:6BC0:60C4:13B5:5BCC:A35D-20170628163030/@comment-26213507-20170628201404

To answer your question: yes, since it isn't considered a "Main Series" game, it is a spin-off game, similar to Elder Scrolls: Travels and The Elder Scrolls Online. Of course, whether or not it is canon is another discussion entirely.