tso describes garments presented as unclean in Joshua's appearance and then ordered removed.

The two occurrences describe garments as unclean: Joshua is clothed in them, and those same garments are ordered removed.

1. Garments described as unclean · dominant

   Both masculine plural absolute forms modify garments in the same scene. In Zechariah 3:3 the APB renders Joshua as clothed in “filthy garments”; in Zechariah 3:4 it renders the command, “Remove the filthy garments from him.”

   Zechariah 3:3Zechariah 3:4

In the Anselm Project Bible: The APB uses “filthy” for the garments in both Zechariah 3:3 and Zechariah 3:4. This rendering is read alongside the plural adjective’s placement with garments in the clauses.