Brexit: Theresa May to meet Angela Merkel and Emmanuel Macron
Cross-party talks aimed at breaking the impasse are also set to continue.
The UK is currently due to leave the EU at 23:00 BST on Friday.
So far, MPs have rejected the withdrawal agreement Theresa May reached with other European leaders last year.
On Monday evening, Parliament passed a bill brought by Labour MP Yvette Cooper, which aims to force the prime minister to request a Brexit extension – rather than leave the EU without a deal on Friday, which is the default position.
The bill received its Royal Assent from the Queen on Monday night, and Commons Leader Andrea Leadsom told MPs that this meant there will be a government motion on Tuesday asking the House to approve the PM’s request to the EU to delay Brexit until 30 June.