I dont think Switzerland has much gun control, I do know that they have a lot of firearms over there and also have a higher suicide rate than the US. If you look at the ownership rate of firearms rather than the international impression of gun control laws then; France, Finland, Canada, Norway, New Zealand count as both having a relatively high amount of firearms and a high suicide rate. The UK has lower rates on both suicide and gun ownership, as does Spain, Holland and Ireland.
I dont know enough about the cultures and laws of other nations, especially about 3rd world, the Middle East and former communist countries, to go into any real detail about this. It's never going to correlate either way though, since there is too much cutural diversity in the world to be able to come up with any honest data. You can take an emotionally crippling but gun free society like Japan and hold it up as proof against gun control and someone else can counter it with the US or Finland.