"We acknowledge that free, fair, and mutually beneficial goods and services trade and investment are key engines for growth and job creation".
Mnuchin also pushed back against the growing global angst over the US-China trade fight, saying that pressuring Beijing into adopting more open trade policies would be good for all.
Mnuchin said on Saturday that he had been told by Chinese delegates that Beijing had no intention of engaging in competitive devaluation during the trade war.
United States Secretary of the Treasury Steven Mnuchin speaks during an interview with Reuters at the International Monetary Fund - World Bank Annual Meeting 2018 in Nusa Dua, Bali, Indonesia, October 12, 2018.
On Thursday, IMF Managing Director Christine Lagarde urged members to "de-escalate" trade tensions and work on fixing global trade rules.
Fears that rates could spike sharply higher - and the worldwide trade tensions - touched off a searing sell-off in global stock markets over the past week.
She said: "Sail together and we will be stronger".
"The recovery is increasingly uneven, and some previously identified risks have partially materialised", the IMFC communique said, referring to threatened tariffs and outflow pressures.
The United States and China have slapped tit-for-tat tariffs on hundreds of billions of dollars of each other's goods over the past few months, sparked by US President Donald Trump's demands for sweeping changes to China's intellectual property, industrial subsidy and trade policies.
"Risks are increasingly skewed to the downside amid heightened trade tensions and ongoing geopolitical concerns, with tighter financial conditions particularly affecting many emerging market and developing countries", the International Monetary Fund said in a communique.
The remark drew concern in Japan, where local media ran front-page stories questioning whether this would give Washington the right to label as currency manipulation any future foreign exchange market interventions by Tokyo to keep sharp yen rises in check. "China and the U.S. are continuing communication about dialogues of all levels", Lu said, without elaborating. Officials including Bank of Japan Governor Haruhiko Kuroda urged the U.S. and China to re-start talks around trade, while policy makers from emerging markets highlighted threats from Federal Reserve-led interest rate hikes.