The UK won't be able to roll over an EU trade deal with Japan in time for a no-deal Brexit, Trade Secretary Liam Fox has said.
It was one of the most important EU trade deals the UK hoped to replicate ahead of the 29 March withdrawal date.
The trade department also said it would not be able to roll over the EU's customs union deal with Turkey on time.
In 2017, Mr Fox said the UK would be able to replicate 40 EU free trade deals by Brexit day.
But so far the department has only been able to finalise "continuity agreements" with seven of the 69 countries and regions with which the EU has trade deals.
These include Switzerland, Chile, the Faroe Islands, Eastern and Southern Africa, Israel and the Palestinian Authority.
The UK also has mutual recognition agreements signed with the US, Australia and New Zealand.
Mr Fox, who was a prominent Leave campaigner, told the BBC: "Of course, we will get access to all the EU's free trade agreements if we leave the EU with a deal, which is the government's policy, and for all those who don't want any disruption, there's one easy way to avoid that, which is to vote for the deal which the Prime Minister has."
Industry group the CBI said deals with Japan and Turkey not being concluded on time would be "an unwelcome surprise" for business.
EU trade deals offer UK companies benefits like reduced tariffs on goods, enhanced access to markets for services and common standards on intellectual property.
British exports to Japan are worth £9.9bn per year.
"Many companies are unaware it is not just their relationships with EU customers at risk from a no-deal Brexit, but those across the globe," said CBI director of international trade Ben Digby.
"Individual businesses trading with markets outside the EU would face tariffs worth millions of pounds being slapped on them instantaneously.
"It is vital no-deal is taken off the table to unlock transition, allowing the UK to remain part of these deals and provide space to agree new arrangements."
People's Vote supporter and Labour MP Stephen Doughty said: "Brexiters promised that voting Leave would mean a bonanza of new international trade deals that would make up for lost trade with the EU.
"Instead, Brexit is costing us the global trade deals we already have as EU members.
"Liam Fox is now finally admitting that his promise to roll over all existing EU trade deals in time for Brexit is going to be broken."