My wife is a green card holder and she wants to travel to Iran in the next month for a couple of weeks. Is she exempt from current 14 days quarantine rule before entering the US?
The current list of US travel restrictions related to COVID-19 can be found here. By the "14 day quarantine rule" I assume you are talking about the Presidential Proclamations that require most people who are present in certain affected countries to spend 14 days in some third country before being allowed to enter the US. As mentioned in the linked page, green card holders are exempt from these proclamations, and thus do not need to spend 14 days in a third country after visiting Iran. There is still a COVID-19 testing requirement, however.