I have a friend who is a practising Muslim.

Answer

Neither is his charity nor his thikr nor his Salaat accepted by Allah Ta'ala. The child who severs ties with his/ her parents is accursed. He is mal-oon. The possibility of leaving this dunya without Imaan is a grave danger overhanging your friend.

Rasulullah (Sallallahu alayhi wasallam) said: "The pleasure of Allah is in the pleasure of your father, and the displeasure of Allah is in the displeasure of your father."

Neither Nafl nor Fardh ibaadat is accepted from a disobedient son/daughter. All of his Salaat, thikr and charity go to waste. In fact, if Allah Ta'ala grants him hidaayat and the taufeeq to repent and restore his relationship with his father, then he should make qadha of all the Fardh Salaat which he had performed during the time when he was under Allah's La'nat. That is the period in which he had severed his ties with his father.

Although technically qadha is not Waajib, the objective of Salaat, which is the Pleasure of Allah Ta'ala and Thawaab in the Aakhirat, has not been acquired. Therefore, it is necessary to make qadha of all such despoiled and futile Salaat which is of no benefit in the Aakhirat.

akin to suicide?

A. While wishing for death is not suicide, it is not permissible to wish for death because of worldly hardships.