The Supreme Court annulled the August 8 presidential poll on Friday, September 1, citing irregularities and illegalities and ordered a fresh election.
US Ambassador Robert Godec said that if the electoral commission felt it was not ready for Thursday's poll, it should ask the courts for a delay.
Speaking on behalf of a group of foreign ambassadors, Robert F. Godec said Monday that the electoral commission had addressed many concerns about its operations since the Supreme Court nullified an August 8 vote because of what it called irregularities and illegalities.
"But no one should use violence or intimidation to disrupt the right of others to vote or to participate".
Last week, a senior electoral commission official fled to the U.S. amid death threats.
The office of Kenya's director of public prosecution on Monday asked police to charge Ruth Odinga and legislator Fred Outa with incitement to violence and obstructing electoral officials from conducting their duties.
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The ruling was a rare victory for veteran opposition leader Raila Odinga, who has since refused to take part in the re-run, accusing the Independent Electoral and Boundaries Commission (IEBC) of failing to make required reforms.
The leaders have maintained their hardline positions on the polls, with Kenyatta saying the elections must go on for the country to move forward while Odinga is determined to stop them, insisting that there would be no elections on October 26.
Mudavadi said Monday's meeting was held with top diplomats from the United States, the European Union, Britain, Norway and Denmark at the request of the embassies.
Opposition leader, Raila Odinga has pulled out, saying the poll won't be free and fair.
However, in an earlier address to the nation last week, IEBC Chairman Wafula Chebukati referred to infighting in the commission and told Kenyans that he could not guarantee credible election come October 26.
The Secretary-General of the United Nations, Antonio Guterres, and the Chairperson of the African Union Commission, Moussa Faki Mahamat, continue to closely monitor developments in Kenya, in the light of the forthcoming presidential election.