Gardaí and emergency services attended the scene outside a residence in Rathmintin, Jobstown, Dublin 24, that occurred at approximately 2pm.
The young child was transferred to hospital in Crumlin, but was pronounced dead, gardaí confirmed yesterday.
Sinn Féin councillor Louise Dunne said the tragedy has left the whole community in shock and everyone is trying to support the family of the little boy.
“Tallaght has a huge amount of community spirit and we will rally around them. The whole community is devastated,” she said.
“We are all wishing them the strength to get through this tragedy. It’s a very sensitive situation,” the Sinn Fein councillor added.

Gardaí and forensic collision investigators at the scene of a road crash in Jobstown, Dublin. Photo: Damien Storan
Today’s News in 90 Seconds, Wednesday, October 8
Gardaí confirmed a Family Liaison Officer (FLO) has been appointed to support the family at this time.
Forensic Collision Investigators have since conducted a forensic examination of the scene.
Meanwhile, a woman also died following a separate road traffic collision near Crosskeys, Co Cavan, on Wednesday afternoon.
The collision involving two cars occurred on a local road in Carrickatober at approximately 3.30pm.
One of the drivers, a woman in her 80s, was pronounced deceased at the scene. Her body was removed to the morgue at Cavan General Hospital where a post-mortem examination is due to take place.
The other driver, a woman in her 40s, was brought to Cavan General Hospital for assessment.
The road was closed for Garda Forensic Collision Investigators to conduct an examination of the scene which has since been completed and the road has now reopened.
Gardaí are appealing for witnesses to this incident to come forward.
Any road users who may have camera footage (including dash-cam) and were travelling in the area between 3:00pm and 3.30pm are asked to make this footage available to investigating gardaí.
Anyone with any information is asked to contact Cavan Garda Station on 049 436 8800, the Garda Confidential Line on 1800 666 111, or any Garda Station.