The dollar held steady on Tuesday, trading near a three-year low against the euro and a six-month trough against the yen, as investors trying to make sense of the constant changes to President Donald Trump'stariffs remained wary of US assets.

Much of the volatility that hit the dollar last week and sent Treasury yields soaring appeared to have abated somewhat on Tuesday, although investor sentiment was still fragile.

The euro , which has been one of the biggest beneficiaries of this month's dumping of US assets, was a touch weaker on the day at $1.1343, narrowly below last week's three-year high at $1.1474.

The dollar weakened by 0.2 percent against the yen to 142.855, not far off Friday's six-month low  of 142.05.

After slumping to a 10-year low against the Swiss franc last week, the dollar was flat at 0.8144 francs on Tuesday. Still, it is down nearly 8 percent against the Swiss franc this month, set for its biggest monthly drop since December 2008.

Market focus has been on the ever-shifting tariff headlines, with the US removing smartphones and other electronics from its duties on China over the weekend providing some relief, although comments from Trump suggested the reprieve is likely to be short-term.

Trump's imposition and then abrupt postponement of most tariffs on goods imported to the US has sown confusion, adding to the uncertainty for investors and policymakers around the world.

There was a greater sense of calm across the market on Tuesday. But given the uncertainty Trump and his vacillation over tariffs have stirred up, analysts expected the reprieve for the dollar to be short-lived.

"With every U-turn in his 'dealmaking', the US president destroys further planning security and even more trust, which is why I ultimately do not expect any significant recovery in the US dollar as long as this uncertainty persists," Commerzbank strategist Antje Praefcke wrote in a note.

The yield on the benchmark US 10-year Treasury note edged up 2 basis points to 4.38 percent after dropping nearly 13 basis points in the previous session.