Arcane III? Unfortunately, no.
Sorry to announce that there will be no Arcane III — at least, not for the foreseeable future. Both of the first two anthologies are solid, enjoyable work that I’m fiercely proud of (without foundation, as I didn’t actually write any of those incredible stories), but sales have been sluggish; at the current rate, even the first volume is years away from breaking even.
However, to assuage your sorrow, remember that Space Eldritch II: The Haunted Stars is due for release in early autumn, and there are other projects coming together that should give you that exciting little tingle at the base of your spine.