Error: Connection to Steam servers lost. (Result = 3)

'Ello, so my server, throughout all today about every couple of hours, will get this error in console:

and nearly time out. Some players time out some don’t, but those who don’t are unable to move or do anything. It’s as though the server crashed.

It looks like it’s all the servers on the same node (or connected to the regional Steam servers). Is there any solution for this? Or way to change what regional Steam server the GMod server connects to?

The lost connection goes on for about a minute until it returns:

Thanks!

Try contacting Steam support for this one; I used to have this issue when I hosted CSS servers.