The embattled leader, who faces a major protest march in central London on Saturday, wrote to lawmakers Friday night saying she would bring the bill back to Parliament "if it appears that there is sufficient support."

She also says she would need the approval of House Speaker John Bercow to bring the plan back for a third time despite his objections.

Lawmakers have twice rejected the deal and haven't shown any clear swing toward endorsing it in recent days. Britain is scheduled to leave the European Union on April 12 if no deal is approved.

Pro-Brexit forces are also girding for the possible impact of a planned march in central London in support of holding a second referendum that would give British voters the option of remaining in the EU despite the 2016 vote in favor of leaving.

The organizers of the "People's Vote March" predict that one of Britain's largest-ever protest marches will grip central London. More than 3 million people signed an electronic petition this week in favor of revoking Article 50, the act that formally triggered the Brexit process.

The march will conclude outside Parliament, which remains divided over Brexit. No consensus on a way forward has emerged despite weeks of extensive debate.

May told lawmakers in her letter that Britain still has options including an extension that would require taking part in European Parliament elections in May.

She also said Britain could revoke Article 50 but characterized that as a betrayal of the Brexit vote in favor of severing EU ties.

She also said Britain could leave without a deal.

In a conciliatory tone, the prime minister offered to meet with lawmakers to discuss Brexit policy.

She had offended many legislators with a speech Thursday night that seemed to blame Parliament for the stalled Brexit process.