Traditional altruism cannot lead to suicide because a suicide does not transfer any good to anyone. You misunderstood altruism.
But, since you bring this up, the foolish Randian idea, that altruism is self-denigration, may indeed lead the altruistically minded to suicide.
As a 12-year old I misunderstood YOUR altruism; but it WAS the pure altruism of Immanuel Kant, Auguste Comte AND MY PARENTS -- and the parents of many other youths who actually did commit suicide, possibly including that 14-year-old prodigy last week. For Comte, altruism is not simple benevolence or charity, but rather the moral and political obligation of the individual to sacrifice his own interests for the sake of a greater social good.
Part of my thinking at the time was, well, if I helped anyone, then I WOULD GET A BENEFIT FROM A BETTER WORLD, and even if it were incrementally better world I WOULD STILL GET A BENEFIT AND THEREFORE IT WOULD HAVE BEEN EVIL -- unless I killed myself immediately upon doing the good deed, so I wouldn't benefit. OR else -- get this -- I could help a criminal, NOT TO REFORM -- BUT TO BE A CRIMINAL. Then I'd be "helping" someone and NOT GETTING A BENEFIT -- but that was obviously ludicrous.
These were pretty heavy thoughts for a thoughtful kid who wanted to be good, but couldn't figure out how with the corrupted teachings I was given. Have you ever had to work through inner turmoil and conflict because of corrupted teachings yourself? It can be crushing for a sickly kid with poor guidance, if any. Castigating a 12-year-old kid for "misunderstanding" something still shows a stark lack of compassion on your part, IMO.