The discussions are linked to the situation in Syria, she said.
British Foreign Secretary Boris Johnson is understood to be working on a proposal from the G7 group of nations, which will demand that Vladimir Putin remove his troops from Syria and drop his backing for Bashar al-Assad.
Allies will also be seeking clarity from the United States on its Syria policy, after some apparently mixed messages.
U.S. secretary of state Rex Tillerson is then expected to deliver a message that the Kremlin faces worldwide isolation if it stands by the regime in Damascus.
The Organization for the Prevention of Chemical Weapons, a global watchdog, said Thursday that it had initiated contact with the Syrian government, and that it was investigating the attack on Khan Sheikhoun.
But as lawmakers called on Trump to consult with Congress on any future military strikes and a longer-term strategy on Syria, Trump administration officials sent mixed signals on the scope of US involvement.
The Trump administration's missile strikes in response to a chemical weapons attack in Syria have received support from both political parties back home.
"We have information from our partners and from contacts on that ground that makes it very plausible that the Assad regime was behind this frightful poison gas attack", he said.
"The recent US attack will create a division among the countries in fighting terrorism and will divert the political talks to military solution".
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UK Foreign Secretary Boris Johnson is expected to press the case for new sanctions against Russian Federation if they don't give ground. "We want to relieve the suffering of the Syrian people".
On Sunday, Tillerson emphasized that the administration considers defeating the Sunni militants of Islamic State the most pressing concern in Syria, not ousting Assad.
Russian Federation and Iran have backed Assad in Syria's six-year-long conflict, as has the Shia militia Hezbollah.
Why was Syria's Shayrat airbase bombed?
The group - made up of Canada, France, Germany, Italy, Japan, Britain and America - had included Russian Federation under the G8 label until 2014, when it left after the annexation of Crimea.
Washington's retaliation was slammed by Iran and North Korea and put it on a direct diplomatic collision course with Moscow, where Tillerson heads on Tuesday for talks with his Russian counterpart Sergei Lavrov.
"I'm a strong supporter that the US should take action to protect humanitarian causes like the ban on use of chemical weapons".
When reports of chemical attacks in Syria first surfaced, former President Barack Obama said the use of those weapons would invoke a US response.
The official Saudi Press Agency reported that King Salman, whose country has been a strong opponent of Assad, congratulated Trump in a phone conversation for his "courageous decision" and a correct response to "the crimes of this regime to its people in light of the failure of the worldwide community to stop it".