"1 Co 3:17. If any … defile … destroy—rather as the Greek verb is the same in both cases, “destroy … destroy.” God repays in kind by a righteous retaliation. The destroyer shall himself be destroyed. As temporal death was the penalty of marring the material temple (Le 16:2; Da 5:2, 3, 30), so eternal death is the penalty of marring the spiritual temple—the Church. The destroyers here (1 Co 3:16, 17), are distinct from the unwise or unskilful builders (1 Co 3:12, 15); the latter held fast the “foundation” (1 Co 3:11), and, therefore, though they lose their work of superstructure and the special reward, yet they are themselves saved; the destroyers, on the contrary, assailed with false teaching the foundation, and so subvert the temple itself, and shall therefore be destroyed. (See on 1 Co 3:10), [ESTIUS and NEANDER]. I think Paul passes here from the teachers to all the members of the Church, who, by profession, are “priests unto God” (Ex 19:6; 1 Pe 2:9; Rev 1:6). As the Aaronic priests were doomed to die if they violated the old temple (Ex 28:43), so any Christian who violates the sanctity of the spiritual temple, shall perish eternally (Heb 12:14)." Jamieson, R., Fausset, A. R., & Brown, D. (1997). Commentary Critical and Explanatory on the Whole Bible (Vol. 2, p. 269). Oak Harbor, WA: Logos Research Systems, Inc.
Speaking of suicide, an overreliance on books "about" this, that, the other - in contrast to time in Scripture itself - ends up as a kind of a slow, suicide of one's ability to understand what Scripture is talking about.
Chiefly because, not knowing any better; one believes what they read in the books they are over relying on. Because what said books assert makes sense to them; often out of their ignorance of the holes in the argument they are reading in such books.
Do yourself a favor; put down the Greek, with their writer's own denominational slant, and just read 1 Corinthians chapters 1 thru 3, a good half dozen times or more. All the while asking 'what is he talking about when he says this in chapter 3?'
Case in point, suppose that two people are going on about the need to keep something between themselves and a few friends, and at one point, one of them says "Guess what; the cat's out of the bag."
Only a knucklehead would conclude an actual cat and an actual bag are what is being talked about. And such a person would conclude that because they right off reached for the Greek, or what have you, in contrast to the plain old common sense of 'what were they talking about, when that was said?'
Its the same with the suicide issue (which 1 Corinthians 3 is not even talking about).
The idea of looking for a verse is not the way to go. Rather, the thing to do is to stop and think of principles, or rules of thumb that would fall under.
To seek that in the Scripture.
Case in point, cigarettes. No where in Scripture does one find a passage for or against cigarettes. Obviously, that is a much more recent phenomenon.
While its core issue - addiction - is not.
Addiction is a lust (desire) of the flesh.
Now we have something we can work with. Because we have first worked all that out to this principle.
Romans 6:12 is then as applicable today as way back when - "Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof."
In other words, refuse to give in to the fleshly mind's outlook.
How? Simply the decision to "Let not sin therefore reign in your mortal body, that ye should obey it in the lusts thereof."
Why? Verse 7 "For he that is dead is freed from sin."
In other words, 'this addiction; this is not who I am in Christ: I am dead to sin, in His death to sin, with Him, I am free from sin's hold over me; I'll not have it reign over me...this is what killed my Saviour; I want no part of it... He died that I might have victory over this, through Him; in Him.."
Romans 5:
21. That as sin hath reigned unto death, even so might grace reign through righteousness unto eternal life by Jesus Christ our Lord.
You'll note that some of the testimonials of those who contemplated suicide but did not, all share a common trait thus far - where they focused their minds - how that they'd end up hurting loved ones, and the action they willed against suicide based on said focus.
That passage in Romans 6:12, is basically doing the same thing. Thus its word "therefore."