"This is something I don't think has really been focused on", the Leave Means Leave co-chairman said on his Sunday LBC Radio show.
United Kingdom data disappointed, indicating shrinking business activity amid Brexit uncertainty.
During a visit to Romania on Friday, Jean-Claude Juncker, president of the European Commission, said that despite Prime Minister Theresa May's struggles to get the deal through the United Kingdom parliament, he continues to hope she can secure backing for it in Tuesday's vote.
The "technical" extension to the Article 50 period being considered by the European Union would mean Brexit would be postponed until at least July - more than three years after the 2016 referendum.
Former prime minister Sir John Major has said the United Kingdom must revoke Article 50 and cancel Brexit to avoid no-deal because "jumping off a cliff never has a happy ending". The monthly GDP was of 0.2%, better than the previous 0.1%.
"Doing so would be a catastrophic and unforgivable breach of trust in our democracy", she wrote in the Sunday Express. If the pair loses the 1.2800 level, however, the risk will turn to the downside, at least short-term.
In a significant shift of tone apparently created to win over hardline Brexiteers who have set their faces against Mrs May's deal, Mr Hunt warned that defeat next week would not necessarily provide MPs with the opportunity to choose their preferred version of Brexit.
"If EU intransigence persists, we must be willing to leave the EU at the end of March on World Trade Organisation terms".
Labour leader Jeremy Corbyn indicated his party would table a no-confidence vote in the government within days of May's deal being defeated in Parliament on Tuesday.
Theresa May told lawmakers they should not let down Brexit-backers.
Corbyn confirmed that he would not consider supporting the government in the meaningful vote on Tuesday, despite Theresa May's last-ditch attempts to garner support for her deal from members on the opposition benches.
The British parliament will act to stop a no deal Brexit from happening, Vince Cable, the leader of the pro-EU Liberal Democrats, said on Sunday.
"No doubt the disagreements would have continued too, but the vast majority of people would have had no truck with an argument that we should leave the European Union in spite of a vote to remain or that we should return to the question in another referendum".
The Government could also ask for an extension to Article 50 - which would have to be agreed by the remaining 27 members of the bloc - either from the current Government or in the instance that a new Prime Minister was appointed either following a vote of no confidence or should Mrs May resign.
She told BBC News NI: "I have been clear that I believe no deal is bad for the United Kingdom, it's bad for the whole United Kingdom because it does put in jeopardy some of those constitutional arrangements".
Mr Davis quit as Brexit Secretary in July over Mrs May's plan for the split.