Just over 1,300 people from Ukraine are living in pledged accommodation in Ireland, despite initial offers of housing exceeding 20,000.
This means just 6.5% of those promised lodgings now host refugees fleeing the war - and a little over 93% have not yet materialised.
34,800 Ukrainians have arrived in the country since the end of February, with more than 25,000 seeking accommodation from State services.
More than 180 unaccompanied children have entered Ireland in the last four months.
The Cabinet Sub-Committee overseeing the response to the war in Ukraine meets tomorrow.
The meeting comes after senior Government officials are understood to have voiced serious concern last week about sourcing further accommodation.
There are particular worries about what will unfold when student accommodation is no longer available at the end of the summer to house people seeking refuge.
There has also been an increase in recent weeks in the number of people from other countries seeking asylum here.
Officials are examining if this is linked to Britain's new Rwanda policy.
Campaigners in the UK lost a High Court bid on Friday to block the British government's plan to send migrants to Rwanda, paving the way for the first flight to go ahead on Tuesday.
While local authorities in Ireland have taken over the vetting process to assess pledged accommodation - only 400 vacant homes are currently housing people.
The Government is aiming to have 6,000 people in pledged accommodation by August.
Local authorities are also refurbishing properties to make 3,000 places available in the short-term.
Around a fifth of people who came here from Ukraine are working, mainly in the hospitality sector.
The Government is now looking at ways of providing more language courses to help such refugees get jobs here.