Completely and utterly unprofessional. Had an interview scheduled by a coordinator for a specific half-hour time slot. The interviewer never calls throughout the entire scheduled time so I email the coordinator to try and understand the situation and see if the interviewer wants to reschedule. I continue to go about my day. The interviewer then calls me about 40 min after the interview was supposed to end and says it was due to scheduling errors on his side. I said it was no problem but I was not in an environment where we could conduct the interview. We rescheduled for Monday. I get an email a couple hours later saying that they're canceling the interview.