What's the chances of my husband in which I'm divorcing soon get custody of our three children if he doesn't have nothing or even a job?

It depends upon all of the circumstances, the ages of the children, the history of the child care arrangements betweeen the two of you, and everything else. If you work and he doesn't and he has taken the major share of kid duties because of this, he will stand a good chance of being able to continue in that role if he wishes to do so. All of the facts surrounding the kids and the relationships are very relevant. It is impossible to opine further without more facts. Good Luck.