The Young Scientist Exhibition which opens this Saturday is just one of the events the President, Mrs McAleese, will not be able to attend because of the broken ankle she sustained while on a skiing holiday in Austria on Christmas Eve.
The President arrived back in Dublin over the weekend in a wheelchair. Her broken ankle is expected to be in plaster for at least six weeks and a spokeswoman said it was not fully known to what extent the President's schedule would be affected.
The accident occurred while Mrs McAleese was on holiday with her husband and three children in the Austrian resort of Bad Hofgastein. She fell while trying to get onto a ski lift and later was operated on under general anaesthetic when she had pins inserted in her ankle.
She was in hospital for three nights.
During a previous skiing holiday in 1998, the President was knocked to the ground by a skier who had lost control.
A spokeswoman said any scheduled engagements taking place in Áras an Uachtaráin would still be going ahead.