The Judeo-Christian tradition holds that God alone has the right to give and to take human life. The willful taking of human life is a sin against the divine image inborn in God's highest creation. God is sovereign, appointing both the end and the beginning of our days.
Murder is condemned in Scripture.
A Christian, with the help of the Holy Spirit, should be able to cope with the stresses that sometimes lead to suicide. A wholesome fear of God and hell provide a strong deterrent to the act of suicide. We do know that Satan is the deceiver who comes to kill, steal and destroy. God alone knows the thoughts, intent of the heart, and mental condition of these persons at the time of suicide. It is sufficient to know the Judge of all the earth will do right.