Basically, the Church has always refused Christian burial to unrepentant public sinners. ѕυιcιdє is the ultimate sin whereby the Church can have no knowledge of any public repentance. So in one sense there's a public presumption that the person was not saved ... but it's a presumption only; it's theoretically possible that the person was not in his right mind or that the person received the grace of perfect contrition in the last moment of life.
Novus Ordites consider this to be "cruel". But how many tens of thousands of souls may have been saved in being deterred from ѕυιcιdє due to the fear of hell? I've known people who said, "I would commit ѕυιcιdє except that my pain would not be elminated but only increased in hell."
When I was growing up in the Novus Ordo I served many funerals, including a number of ѕυιcιdєs. And the priest talked about how the person has left his pain behind and is now in a better place. No doubt trying to "console" the family. But if I heard this sermon and was suffering greatly, hey, why not leave it all behind and go to a better place by committing ѕυιcιdє, eh? So much for the false Novus Ordo charity. Yes, the family left behind suffers with the prospect that a loved one might have been damned. But that's the case no matter what public sin a person might die in. It happens all the time that people leave the Church and die outside. So those families too grieve at the prospect of a lost loved one (except of course that no one believes in EENS anymore).
In any case, the Novus Ordo has a misguided view of charity ... thinking it more important to emotionally console people than to save untold numbers of souls from the fires of hell by putting out there a strong public statement regarding ѕυιcιdє as a deterrent. That's most likely because 99% of all "Catholics" today follow Cardinal Cushing in believing that "If I die and you're not in heaven, that just means you haven't died yet."
Private prayer for such a one should not be discouraged however. Obviously God knows the future and He can take into account future prayers to perhaps grant the grace of a final act of perfect contrition to the person. So continue to pray for this poor soul.