Vitaly Churkin kicked the bucket all of a sudden at work in his New York office a month ago.
The workplace of the central therapeutic inspector said that points of interest of his demise were being withheld to agree to global law.
Mr Churkin had filled in as diplomat to the UN since 2006.
The reason for the veteran negotiator’s passing stays indistinct.
“The New York City Law Department has trained the Office of Chief Medical Examiner to not freely uncover the cause and way of death of Ambassador Vitaly Churkin,” a representative for the therapeutic inspector’s office, Julie Bolcer, said in an announcement.
“Minister Churkin’s conciliatory resistance survives his demise,” the announcement, which was posted online by New York Times journalist Michael Grynbaum, included.
A state division official told the BBC that further remark or subtle elements on the aftereffects of the posthumous couldn’t be unveiled on account of an understanding between the US and the UN.
In a letter to the city’s legitimate office, the United States’ UN mission said the Russian government had as of now griped about proclamations made by city authorities with respect to Mr Churkin’s restorative history.
Russian authorities contended that the data was private and that revealing subtle elements could make humiliation the diplomat’s family or hurt his notoriety.
They didn’t indicate which reports the Russian government had refered to.
A month ago, Russian President Vladimir Putin said he was “lamented” to learn of the demise of Mr Churkin, who had built up a notoriety for being an undaunted guard of Russian approach.
The remote service additionally paid tribute to an “exceptional ambassador”.
State TV channels Rossiya 24 lauded Mr Churkin for “putting his adversaries into stun” and abandoning them with “nothing to state”.
A large portion of those “adversaries” swung to online networking to offer their regards to an associate who they may have not generally concurred with, but rather regarded colossally.
Mr Churkin, who was conceived in Moscow, fiddled with going about as a youthful adolescent – showing up in two movies about Vladimir Lenin – before going to the prestigious Moscow Institute of International Relations, in the end starting a vocation in Russia’s remote service.
Before bringing up the position with the UN, he filled in as an emissary to Canada and Belgium, and as an exceptional delegate to the discussions on previous Yugoslavia in the mid 1990s.