Court documents released on Monday show how an adviser to Donald J. Trump’s presidential campaign, George Papadopoulos, repeatedly sought to set up a meeting between the Russian government and Mr. Trump and his campaign officials.

Mr. Papadopoulos contacted the campaign at least 11 times from March to June 2016 about a potential meeting. Campaign officials discussed or replied to his messages at least three times, and they encouraged Mr. Papadopoulos and another adviser to make the trip to meet Russian officials, which never took place.

Meets a Professor With Russian Ties

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On March 14, 2016, Mr. Papadopoulos, while traveling in Italy, met a professor who claimed to have substantial connections with Russian government officials. At the time, Mr. Papadopoulos was set to become a foreign policy adviser for the Trump campaign.

On March 24, Mr. Papadopoulos met again with the professor, who brought a Russian woman he introduced as having ties to the Russian government.

Seeks a Meeting Between Russian Officials and Trump Campaign

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After the meeting with the professor, Mr. Papadopoulos emailed the Trump campaign supervisor and members of the campaign’s foreign policy team about arranging a meeting between campaign and Russian officials to discuss how United States-Russia relations would be if Mr. Trump were elected.

In response, the campaign supervisor said that he would “work it through the campaign,” but that no commitment should be made at that point, adding, “Great work.”

On March 31, at a national security meeting in Washington, D.C., with Mr. Trump present, Mr. Papadopoulos said that he had connections that could help arrange a meeting between Mr. Trump and President Vladimir V. Putin of Russia.

Mr. Papadopoulos continued to correspond with the professor and the Russian woman to arrange a meeting, while informing the campaign of his progress.

Speaks With Another Russian Connection

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On April 18, the professor introduced Mr. Papadopoulos via email to a Russian who said he had connections to the Russian Ministry of Foreign Affairs.

Over the next several weeks, Mr. Papadopoulos and the Russian had multiple conversations trying to set up a meeting between Russian officials and the Trump campaign.

On April 25, Mr. Papadopoulos emailed a senior campaign adviser and said there was “an open invitation by Putin for Mr. Trump to meet when he is ready.”

Learns About ‘Dirt’ on Clinton

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On April 26, in another meeting with the professor, Mr. Papadopoulos is told that the Russians had obtained “dirt” on Hillary Clinton, involving thousands of emails.

Told to Pursue a Meeting

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After the conversation with the professor, in at least eight emails to campaign officials, Mr. Papadopoulos reiterated Russia’s interest in meeting with Mr. Trump.

In June, Mr. Papadopoulos asked a high-ranking campaign official about the trip again, stating that “I am willing to make the trip off the record if it’s in the interest of Mr. Trump and the campaign to meet specific people.”

In August, the campaign supervisor encouraged Mr. Papadopoulos and another adviser to “make the trip, if it is feasible.” The trip did not take place.

Pleads Guilty to Lying to the F.B.I.