You walk a very this line here and you have to ask yourself this: "Why am I mentioning this?"
Personally, I touched on some of the extraneous things that happened to me in my undergrad but that was neither the focus of my personal statement nor were they excuses for a poor academic transcript. I was able to show that it made me a tougher nut to crack, so to speak, more mature, and increase my drive to make my life mean something - one reason that I'm doing medical research right now.
So the question remains, was this something that shaped you, or is it a distraction that you want to use as an excuse? Forgive me if any of these questions seem unsympathetic; these are my personal feelings after suffering through significant loss. I also want to emphasize this was how I went about touching on these events in my SOP - I am neither an adcom nor one that works closely with them.