If someone's account gets closed or suspended, will any PMs you have had recently with them get removed?  

I had a PM from someone 2 days ago, but didn't have time to answer then hubby took laptop to work on Friday so planned to deal with the PM today--it's nowhere in my inbox to be found, nor the couple previous PMs I've had with this member.

They don't get removed unless you delete them.

Did you check your "From Me" tab in your personal messages?  If I can't find them in my inbox, I can usually find them there.  Good luck!

If you remember a word that was used in the message, you can use the search function ("to me") on the personal messages page to try to find it.  Or, when the message was sent, you would have been sent an email (unless you have those emails turned off on your Settings page) and a copy would have been placed in your Club Communications folder, which you'll find on the yellow bar at the top of your main My Account page.