It is certainly not forbidden to feel aggrieved
for a dead person for more than three days. To grieve for a person is not in
one's control. In fact, it is so natural that the Prophet (sws) himself wept
the death of his son, Ibrahīm:
When Ibrahīm was about to die, the Prophet (sws), it is
reported, picked him up, kissed him while tears were coming out of his eyes.
One of his companions asked: O Prophet of Allah, do you cry also? The Prophet
replied that this crying was a blessing and then while weeping remarked: Eyes
shed tears and the heart is aggrieved but we shall only say that with which
the Lord is pleased and we are sad at being separated from you O Ibrahīm! (Bukhārī,
The thing which is desirable is that a person should
come back to his or her normal life routine by not later than three days. He
should not just sit and sob after this period, but should try to adjust to the
new situation and try to follow his general routine.