The problem is deep rooted and requires more than government policy or guidelines
Modern society is an unnatural, high-intensity environment that offers little rest or escape. A heightened suicide rate is a natural indicator that populations are living in unnatural environments. The problem cannot be addressed until this issue is. The solution should be a massive rethink of how modern societies should live at a fundamental level.
Arguably the main changes that should occur in the lives' of urban populations are shorter working hours, more physical recreation time, greater access to natural landscapes and open water (all of these have been proven to have positive effect on peoples mental health). Governments desperately need to implement policies and guidelines to promote such changes. The role of nature, lifestyle and human health need to be taken into account while redeveloping the modern living environment, a complete redesign of the urban landscape and what people do in it is probably necessary to fully address this issue.
However, the foundation cause of this problem is undoubtedly the suicidal individual’s brain chemistry, as some people manage to overcome certain situations in life and some do not, no matter the level of support or therapy they receive. Greater understanding of the biochemical mechanisms behind depression are needed, in order to address this problem from its root cause. So far, research has show that depression has a strong genetic link, and furthermore there is a distinguished rate of serotonin metabolism in individuals suffering from depression.
Major funding into human bio-chemistry and psychology would help us to fully comprehend the complexity of the mental health issues surround things like suicide and depression. Humans have evolved for so long and our biochemistry and DNA is nearly identical to how we have evolved in the natural world. The proliferation of modern diseases both physiological and mental can be explained in the most part by our environment having changed from a place of living integrated with nature to a modern existence largely removed from the natural world, in a relatively short space of time. Better understanding of the problem is needed to offer better technological, or indeed non-technological solutions accordingly.