The Irish premier has said he had concerns he would be pressured into a deal by European Union partners.
European leaders have said that the door is open for Britain to return to the European Union.
Irish premier Leo Varadkar has said he believes the Good Friday Agreement should be reformed to change the controversial petition of concern.
The Irish premier has said he is confident an agreement between the UK and EU over Brexit can be reached by Wednesday night.
Boris Johnson has just days to secure a new Brexit deal with the EU summit starting on Thursday in Brussels.
UK and EU officials will resume talks on Monday with the prospects of a Brexit deal apparently finely balanced.
The DUP has poured cold water over a reported Brexit compromise to end the deadlock over the Northern Ireland backstop.
British and EU officials will continue Brexit talks over the weekend amid rising speculation a deal is on the cards which could break the deadlock over the Irish border.
Any Brexit deal that traps Northern Ireland in EU structures will not get DUP support, Arlene Foster has warned.
Boris Johnson and Irish premier Leo Varadkar have said they can “see a pathway” to a possible Brexit deal, breaking the deadlock on the Northern Ireland backstop.
Boris Johnson is meeting Leo Varadkar for last-ditch Brexit talks in a bid to break the deadlock as the departure deadline looms and progress with the EU falters.