Nick: I had a 6mm aneurysm in the interior communicating artery. (But it wasn't wide necked. My understanding is that would suggest a stent as well as coils.) I was told by a neurosurgeon at UCSF that 5 is kind of the cut off point where one should seriously consider doing something about it. If I were in your situation, and considering your age, I would just watch-and-wait with a 3mm aneurysm.