Idle issues possibly the carburetor

Recently my car has been giving me issues when I am braking and stopping. Sometimes it will just idle extremely low where it seems like it is about to turn off, and sometimes it does turn off. I am not exactly sure what the problem is but I have replaced both fuel filters, spark plugs, air filter, oil filter, and none of those has changed the idle. I am kind of stumped. Any help would be appreciated.