Please explain joined too many parties.
Party suppression only affects you when you’re using the LFG. This is to stop players form spamming LFG with “buy gold from xxxx site” and stops spammers and trolls from entering LFG parties left and right and spamming.
From my experiences, you get the party suppression when you try to join a party the same time as someone else and get booted for the last spot. you enter and exit the party so fast that the system thinks you’re a bot on the lfg and automatically gives you the lfg/party suppression. And from the last time I had this happen to me, I was locked out for around 15 mins.