You can't do this with the normal NSD3 config file: NSD does not know (or care) about your naming scheme for zone files. Implementing such a thing would violate it's KISS design principle.
Another issue that make this difficult is that, unlike BIND, NSD doesn't automatically generate master/slave zone transfer ACL's from the zone file. So you would still have to specify these somehow.
But you can of course generate (part of) your NSD config with a script that does this for you. A quick mock up:
# static configuration here
for i in /etc/nsd3/zones/*.zone
printf "zone:\nname: %s\nzonefile: %s\n" "$(basename $i zone)" "$i"
done > /etc/nsd3/zones.conf