Zenit posted a response to this question which causes such grief and worry for those left behind:Funeral Masses for a Suicide
NOV. 15, 2005 (Zenit.org
Answered by Father Edward McNamara, professor of liturgy at the Regina Apostolorum Pontifical University.
Q: What is the current stand of the Church regarding the possibility of funeral Masses "in corpore presente" of persons who are said to have committed suicide? Is it true that there already are mitigating circumstances, like the possibility of irrationality at the moment of taking one's life (even if there was no note), whereby it would be possible to suppose that the person was not in his right mind, and that therefore it is licit to let the funeral entourage to enter a church and a funeral Mass be said? -- E.C.M., Manila, Philippines
A: In earlier times a person who committed suicide would often be denied funeral rites and even burial in a Church cemetery. However, some consideration has always been taken into account of the person's mental state at the time.
In one famous case, when Rudolph, the heir to the throne of the Austrian-Hungarian Empire, committed suicide in 1889, the medical bulletin declared evidence of "mental aberrations" so that Pope Leo XIII would grant a religious funeral and burial in the imperial crypt. Other similar concessions were probably quietly made in less sonorous cases.
Canon law no longer specifically mentions suicide as an impediment to funeral rites or religious sepulture. Canon 1184 mentions only three cases: a notorious apostate, heretic or schismatic; those who requested cremation for motives contrary to the Christian faith; and manifest sinners to whom a Church funeral cannot be granted without causing public scandal to the faithful.
These restrictions apply only if there has been no sign of repentance before death. The local bishop weighs any doubtful cases and in practice a prudent priest should always consult with the bishop before denying a funeral Mass.
A particular case of suicide might enter into the third case -- that of a manifest and unrepentant sinner -- especially if the suicide follows another grave crime such as murder. In most cases, however, the progress made in the study of the underlying causes of self-destruction shows that the vast majority are consequences of an accumulation of psychological factors that impede making a free and deliberative act of the will.
Thus the general tendency is to see this extreme gesture as almost always resulting from the effects of an imbalanced mental state and, as a consequence, it is no longer forbidden to hold a funeral rite for a person who has committed this gesture although each case must still be studied on its merits.
Finally, it makes little difference, from the viewpoint of liturgical law, whether the body is present or not. If someone is denied a Church funeral, this applies to all public ceremonies although it does not impede the celebration of private Masses for the soul of the deceased. The same principle applies to funeral Masses of those whose body is unavailable for burial due to loss or destruction. Certainly the rites are different when the body is present or absent, but the Church's public intercession for the deceased is equally manifest in both cases.