According to a report first published Saturday by The New York Times, citing confidential government records that were described to the newspaper, Donald Trump Jr., Kushner and Natalia Veselnitskaya, a Russian attorney, met at Trump Tower in New York on June 9, 2016.
This is the first confirmation of a meeting between Trump family members and Russians during his campaign for the presidency.
Donald Trump Jr. on Saturday described the meeting as brief and said it mostly concerned Americans' ability to adopt Russian children.
"It was a short introductory meeting," Trump said in a statement. "I asked Jared and Paul to stop by. We primarily discussed a program about the adoption of Russian children that was active and popular with American families years ago and was since ended by the Russian government, but it was not a campaign issue at that time and there was no follow up.
"I was asked to attend the meeting by an acquaintance, but was not told the name of the person I would be meeting with beforehand," he added.
"As we have previously stated, Mr. Kushner's SF-86 was prematurely submitted and, among other errors, did not list any contacts with foreign government officials," he said in the statement.
"The next day, Mr. Kushner submitted supplemental information stating that he had had 'numerous contacts with foreign officials' about which he would be happy to provide additional information. He has since submitted this information, including that during the campaign and transition, he had over 100 calls or meetings with representatives of more than 20 countries, most of which were during transition," the statement said.
"Mr. Kushner has submitted additional updates and included, out of an abundance of caution, this meeting with a Russian person, which he briefly attended at the request of his brother-in-law, Donald Trump Jr.," the statement continued. "As Mr. Kushner has consistently stated, he is eager to cooperate and share what he knows."
Veselnitskaya is best known for her work against the Magnitsky Act, a 2012 bill that blocks certain Russian officials' entrance to the U.S. and their use of the U.S. banking system.
The Magnitsky Act was largely a response to the death of Russian lawyer Sergei Magnitsky in a Moscow prison in 2009. Magnitsky was killed by Russian police after he uncovered a huge tax fraud scheme linked to the top levels of the Russian state. The act serves as a blacklist that targets Russian officials involved in the murder and its cover-up.
After the act was passed, Russia stopped allowing Americans to adopt Russian children.