under-attended

adjective3

1. •
   Attended by too few people.

   • Surely, this was a lovely event on the whole. Perhaps a tad under-attended, maybe a wee bit unstructured. — 2015
2. •
   Alternative form of underattended.
3. •
   Given too little attention.

   • But the king shouldn't complain about long hours and tiresome work as chief supervisor, it is those of Israel who are actually so exhausted that their farms are being left under-attended. — 2005