Well, it's a loaded question: while depression is indeed a mental disorder, I don't consider someone who is depressed to not be sane. Indeed, I know some psychotics who are quite "sane" in that you could have an intelligent, well-spoken conversation with them and you'd never know they were psychotic - at best, you might guess at some mild form of personality disorder.
However, I get the gist of what you're asking (I also get that you're continuing to refine your question and will probably do so until you can't help but get the answer you want.) Sure; there are several drugs on the market of which suicidal thoughts or urges are side effects, either on their own or in combination (ironically, the most prevalent of these drugs are antidepressants.) I may not be healthy, but my diabetes has nothing to do with my back - take it out of the equation, and I still have excruciating, 24/7 pain. If I had another bad lumbar disc, I don't know what I'd consider. TBF, this is exacerbated by my diabetes insofar as I can't take corticosteroidal spinal injections, which are the preferred treatment for my back condition. All in all, though, one could ignore my diabetic condition and I could still envision a scenario in which I might consider all sorts of things.
Alcoholism can induce suicidal thoughts, as can habitual drug use (depending on the drug) independently of the depression that one can realize from being an addict. And don't forget that a common symptom of depression is an inability to recognize one's own depression for what it is.
To sum up, based on what I think you're trying to get rather than the letter of your question - nope. If there is no palliative medical use for suicide, then the desire for such is itself an indication of a need for psychiatric care - NOT for some trigger-happy Mengele to start killing people whose deaths wouldn't qualify as euthanasia.





