The funeral Mass of Conor, Darragh and Carla McGinley takes place tomorrow.
The siblings were found dead at their home in Newcastle in Co Dublin last Friday.
A Mass of the Angels will be held in the Church of The Holy Family in Rathcoole at 11 o'clock followed by burial in Newcastle Cemetery.
Their mother, 43-year-old Deirdre Morley, was charged with their murder yesterday.
She was remanded in custody to appear again before Dublin District Court next Wednesday.
