Hazara migration to Iran started in the late 19 century when Abdul Rahman Khan became king of Afghanistan in 1880.
Abdul Rahman khan, the cruel king of Afghanistan massacred more then 60% of Hazaras by the late 19th century until his date in oct-01-1901. It was then, when the Hazaras started to flee for their lives from Afghanistan to the neighboring countries including Pakistan, Iran, and a smaller number to Uzbekistan, Tajikistan and Turkmenistan.
Population of the first wave of Hazaras who moved to Iran due to the 19th century atrocities by the Afghanistan Government in that period of history are now around 600,000, mostly live in the eastern province of Khurasan. Descendants of this group of Hazaras are called Khawaris or Barbaris.
Unlike Hazaras of Pakistan, Khawaris are not recognized as a Hazara ethnic or tribe in Iran, despite their distinct south-Asian facial features and their history of geographical misplacement. Over the passing of generations, Khawaris/Barbaris language has gradually changed from Dari, Hazaragi dialect to Iranian persian/farsi.
A large number of Hazaras are also living in Iran as Afghan Refugees.
Migration of Hazara refugees to Iran started from the Russian invasion of Afghanistan in 1979 to the current political unrest, and Hazara Targeted killings / Hazara Genocide.
Hazara refugees in Iran are living a stressful and difficult life due to many restrictions and bylaws imposed on Afghan Refugees. For example, Hazaras refugees living in Iran can not travel freely between cities. They are only allowed to work in some designated factories provided that they have legal refugee documents and work permit.