The Taoiseach says a Brexit deal is still possible ahead of a European Council Summit in two weeks time.
Leo Varadkar says there's time for the UK government to put forward further proposals.
He says next Friday would be a reasonable deadline but says there needs to be an understanding that the withdrawal agreement is an international treaty and needs the input of lawyers.
Mr. Varadkar says the UK has not proposed further solutions to break the deadlock and problems remain around the issues of consent and the prospect of customs checks.
The Taoiseach says time to reach an agreement is tight adding people across the EU accept that a Brexit extension would be better than no- deal.
Meanwhile, Boris Johnson says there'll be no more "dither and delay" and Brexit will happen at the end of the month with or without a deal.
Writing in two Sunday papers, the British prime minister says the UK will be "walking out" of the EU in 25 days.
But the EU's chief Brexit negotiator Michel Barnier says he can't proceed with talks unless plans change.
Speaking on the BBC Andrew Marr Show, UK Brexit Secretary Stephen Barclay says they have to replace the backstop as its been rejected by Parliament.