WASHINGTON — Donald Trump Jr. told Senate investigators on Wednesday that he did not inform his father at the time about a June 2016 meeting with a Russian lawyer promising “dirt” on Hillary Clinton and that he was not kept abreast of negotiations over a proposed real estate project in Moscow, a person familiar with his testimony said.

The younger Mr. Trump, in roughly three hours of closed-door questioning in front of the Senate Intelligence Committee, said that he had nothing to correct from past statements that he had given that panel and other congressional bodies — despite claims by former Trump aides to the contrary.

Questioning appeared to focus on two of the most scrutinized issues of the 2016 presidential campaign: a meeting in Trump Tower in Manhattan between top Trump campaign officials and a Russian emissary, and the extensive efforts of the Trump Organization to secure a major development in Moscow even as Donald J. Trump was running for president.

“I don’t think I changed anything of what I said because there was nothing to change,” Donald Trump Jr. told reporters as he emerged from the session.