Re: Mass Effect 3 in 4K does not work like Mass Effect 2 in 4K
As the game was in production, about 10 years ago, 4K costumer Monitor were much less frequent as they are now.
However, there were very early complaints about the scaling of the interface, but BioWare never implanted a fix.
If you on a PC, you can use this mod on the Nexus to work around the problem.
Otherwise, or if you don't want to use Mods, you out of luck. There will be no fix for this problem.