Guajardo stressed that the most hard issues had been left to the end, including the USA demand that NAFTA be approved every 5 years, a provision known as a sunset clause.
Before entering the meeting with Lighthizer, Guajardo was asked by reporters whether Canada would take part next week in the talks, and he said "possibly".
"New President of Mexico has been an absolute gentleman", he said, referring to leftist Andres Manuel Lopez Obrador, set to take over later this year.
Pakistan supports Saudi Arabia in diplomatic row with Canada
But several of those going say they used a contact number provided by the airline, but there was no answer when they telephoned. According to the CBC , the Saudi Students' Association of Canada has told students not to speak with media.
The issues the two countries are hammering out include what percentage of auto industry components need to be made in North America to avoid tariffs, and how many cars and trucks need to be made in factories paying higher wages.
In response, Canadian officials announced "dollar for dollar" retaliatory tariffs, as Prime Minister Justin Trudeau called them at the time, to the tune of over C$16 billion in US imports.
US Secretary of State Mike Pompeo and Mexican Foreign Secretary Luis Videgaray discussed addressing irregular migration through Mexico and the region, a State Department spokesperson said.
"We're glad Mexico and the USA continue to work out their bilateral issues".
Guajardo said that once bilateral U.S.