The Irish government is expected to survive a confidence motion over its handling of fuel protests.
The singer came to prominence when she began performing with her family in the group Clannad, which was formed in 1970.
Scarlett Faulkner, who was in her 20s, had been critically ill since the attack in County Tipperary.
Taoiseach (Irish PM) Micheál Martin said groups "with a self-declared" mandate have imposed blockades.
Hundreds of petrol stations in the Republic of Ireland have run out of fuel as the protests and blockades continued for a fifth day.
Travel across parts of the Republic of Ireland was affected for the fourth day in a row as vehicles, including tractors, blocked roads.
The remains of 69 infants have now been found in an ongoing dig at the former mother and baby home site in the Republic of Ireland.
Some passengers heading to Dublin airport had to leave their vehicles and walk down the hard-shoulder.
The Irish military will be deployed to move vehicles "blocking critical infrastructure".
