Last year, the Trump Organization, now largely run by President Trump’s eldest sons, Eric and Donald Jr., began pursuing a deal with Alterra and seeking agreements with dozens of other partners across the country for its new Scion hotel brand, a less-expensive alternative to its five-star line.

The potential pairing with Alterra became an early test of the Trump Organization’s process for approving deals while Mr. Trump is in the White House.

To manage ethical concerns, the company has hired an outside adviser to review potential agreements and has also vowed to forgo new deals abroad to limit possible conflicts of interest.

If the company had moved ahead with an Alterra partnership, however, it was poised to essentially import those international connections. The ethics adviser, Bobby Burchfield, raised questions about the potential sources of financing and about Yusuf Sarimsakci’s ties to Russia, according to a person briefed on the process, who spoke on the condition of anonymity to discuss private deliberations.

In response, Mukemmel Sarimsakci said that his brother would not be involved in the hotel project and that the money for it would come primarily from domestic sources. But before those claims could be verified, Trump Organization executives decided not to move ahead with an agreement.

The decision came down to a number of factors, according to Mr. Danziger, who said that the company’s other potential deals in the Dallas area were more attractive. He took particular issue with Mr. Sarimsakci’s decision to publicly promote his possible partnership with the Trumps.

The other potential Scion deals being considered in the Dallas region, Mr. Danziger said, would “undergo the same rigorous process for approval.”