Suicide is a mental health issue.  However, one cannot use crimes involving firearms as the equivalent to all violent crime. Removing firearms from the equation has never eliminated violent crime, or even crime with firearms. Neither the UK, or Australia have seen violent crime disappear as a result of the firearms policies. The problem with someone dying in a domestic dispute should be that they died, not the tool used to do it. They aren't somehow more dead because a gun was used, not a knife.

Violent crime has been on a downward trend in North America for ages, and that's with record high firearms sales.