Wiktionary
unprofessionalism
n. Behaviour that is not professional.
Usage examples of "unprofessionalism".
You've gotten personally involved in the Short case, and that's an unprofessionalism I will not tolerate.
He had, then as now, been dismayed by the sheer unprofessionalism of it, and had long since convinced himself that the fear that she was about to back out of the project he had fought so long to set up was all that had kept him from standing up and walking out.