He intended to do tamattu’ and he did ‘Umrah, but then he left and did not do Hajj
Question

                I entered ihraam for ‘Umrah of tamattu’, then when I saw how bad the crowding was, I completed my ‘Umrah and went home, and I did not enter ihraam for Hajj. Do I have to do anything?.
Praise be to Allah.If you had done the Hajj of Islam (obligatory Hajj) before, then you do not have to do 
    anything. If you had not done Hajj before, then you should have stayed until you had done the obligatory Hajj. You should hasten to do Hajj as 
    soon as you can.
Shaykh Ibn ‘Uthaymeen said:
If the person who is doing tamattu’ enters ihraam then he decides before he enters ihraam for 
    Hajj not to do Hajj, then he does not have to do anything, unless he had made a vow. If he made a vow to do Hajj this year then he has to fulfil 
    his vow, but if he did not make a vow then there is no blame on him if he does not do Hajj after doing Umrah.