The little shoot at the bottom of that pic is actually coming from the amelanchier
Another photo of the possibly dead acer. Looks like possibly it started making buds but they stopped before swelling. It was very shapely of branch, but in leaf a bit of a giant red mound
quite a few different things in that pic - nice amelanchier - so it's hard to tell if the acer is dead.
looks like there might be a life shoot near the bottom?
mine has been in leaf for several weeks now so i'd agree that something is up with yours.