My brother has violation of probation/driving intoxicated 3rd or more and no bond. What kind of sentencing can he expect?

The probation officer and the original judge will make that decision. The factors will be the the nature of the original offense and the terms of his release and probation. The DUI is VERY problematic and our expectation would be that he would have to do the remaining time left on the original sentence and pray he does not get another charge for the dangerous DUI