No there are two types of suppression. There is the notification, i.e. log entry, and then there is the reject. The screen shot posted has the reject setting set for 5 times and then you are rejected for the next 60 minutes. If you fail 5 times, then for the next 60 minutes no matter what you do from that MAC address you will get a RADIUS reject from ISE. The reject message won't show up in the logs. ISE will just send a reject.