The president has signed an executive order that would have new tariffs on a number of US trading partners to go into effect in seven days, on August 7, and not August 1.
The order applies to 68 countries and the 27-member European Union.
Some of them had reached tariff-reducing deals but others had no opportunity to negotiate with Washington.
Countries not listed in the order would face a baseline 10% tariff.
The reason for this delay is the government needs time to harmonize the tariff rates, the AP news agency quoted a senior US official as saying.
Trump slaps higher tariffs on dozens of countries
President Donald Trump's imposed higher tariffs ranging from 10% to 41% on a number of economies.
Rates were set at 25% for India's exports to the US, 20% for Taiwan's, 30% for South Africa's and as high as 41% for Syria's.
The tariff rate for Pakistan stands at 19%, while Israel, Iceland, Fiji, Ghana, Guyana and Ecuador will all be charged at 15%.
The impoverished African nation of Lesotho, which had initially faced a 50% tariff, will now be hit with a 15% levy.
US announces raising Canada trade tariffs from 25% to 35%
US President Donald Trump signed an executive order raising tariffs on Canadian goods to 35% from 25% on all products not covered by the US-Mexico-Canada (USMCA) trade agreement, the White House said.
It added that goods transshipped to another country to evade the new tariffs will be subject to a transshipment levy of 40%.
The increased tariff was the result of Canada's "continued inaction and retaliation," Washington said.
"We haven't spoken to Canada today. He's (Carney) called and we'll, we'll see," Trump told reporters during an event at the White House before the 35% rate was announced.
Thailand, Cambodia welcome new US tariff rate
The governments of two Southeast Asian countries, Thailand and Cambodia, welcomed the 19% levy Washington announced for them, which are substantially lower than the rates Trump announced in April.
In April, Trump had announced "discounted reciprocal tariffs" of 36% on Thai goods and 49% on Cambodian products.
"This is the best news for the people and economy of Cambodia to continue to develop the country," Cambodia's Prime Minister Hun Manet wrote in a Facebook post.
A Thai government spokesperson, meanwhile, called it a "major success."
"This finalized deal, setting US import tariffs at 19%, marks a major success for Thailand," Thai government spokesman Jirayu Huangsab said in a statement.
"It represents a win-win approach aimed at preserving Thailand's export base and long-term economic stability."
The tariff announcement came days after the US president intervened to help broker a ceasefire between Thailand and Cambodia following days of heavy border clashes between the two neighbors, which left over 40 people dead and hundreds of thousands displaced.
Taiwan says 20% US tariff is temporary as talks continue
Taiwan President Lai Ching-te said Friday that the new 20% US tariff on goods from the island is a temporary measure and that his government is working to secure a more favorable rate.
"The 20% tariff rate was never Taiwan's target to begin with. We will continue negotiations and strive for a rate that's more favourable for Taiwan," Lai told reporters at a press briefing.
The tariff was part of a broader executive order signed Thursday by US President Donald Trump, which imposed duties ranging from 10% to 41% on imports from dozens of countries.
While the 20% rate for Taiwan is lower than the 32% initially threatened in April, it is higher than the 15% applied to Japan, South Korea, and the European Union.
Taiwan recorded the sixth-largest trade surplus with the US last year, exporting about $74 billion more than it imported, according to official figures.
