If you eat meatballs that are left out for more than 3 hours can you die from it

Hey there!
I don't think you can. Obviously, bacteria can build up and it could be slightly harmful, but i'm quite sure that this kind really won't kill you. You can just get a bad infection.
Hope this helps!

Yes. Potentially you can die. You would most likely become very ill as the bacteria will build up and when you eat it the bacteria will give you food poisoning symptoms (vomiting, diarrhea).  If it is severe it can cause dehydration. It is dehydration that would cause organ failure and potentially death.

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