If someone has a mental deficiency and passes away before experiencing a long life, will they still have a hereafter and participate in the Day of Judgment?

LifeHereafterQiyama
If someone has a mental deficiency and passes away before experiencing a long life, will they still have a hereafter and participate in the Day of Judgment?
Sayyed Mohammad Al-Musawi, Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to... Answered 1 year ago

Allah is The Most Merciful on all His creatures. His Mercy on this person is much greater than your mercy on him. Allah will never punish a person who had mental deficiency which prevented him from knowing the truth and rules which are obligatory on usual persons. Allah’s Mercy will be much greater than our expectations.

Wassalam.