"Simply put, it’s not going to happen", Billingslea told reporters when asked about a moratorium, then repeated allegations that Russian violations destroyed the Intermediate-Range Nuclear Forces (INF) treaty.
US and Russian technical working groups on arms control will meet in the coming days in Vienna, Billingslea said during a virtual panel discussion.
"Of course this is an evolutionary process, I do hope after the expert and technical working groups meet in the coming days in Vienna that we will make sufficient progress", Billingslea said.
The United States withdrew from the 1987 INF Treaty in August 2019 after formally suspending its obligations in February and triggering a six-month withdrawal process. Russian officials have repeatedly denied US allegations of violating the pact.
US Willing to Consider Extension of New START Treaty Under Special Circumstances
Ambassador Marshall Billingslea continued on by saying that the United States is willing to extend the New Strategic Arms Reduction Treaty (New START) but only based on special circumstances.
"We are willing to contemplate an extension of that agreement but only under special circumstances", Billingslea said.
Those conditions include progress on talks with China, addressing Russian programs, and improved verification.
Billingslea further elaborated that the United States and Russia eye the second round of arms control talks in late July or early August and will again extend an invitation to China to join.
"Sufficient progress was made ... we could even envision perhaps at the end of July or maybe the beginning of August a second round in Vienna, which I think is something that the world will welcome", Billingslea said. "China again will be called upon to attend".
Russian-US consultations on strategic stability concluded on 23 June in Vienna. The Russian delegation was led by Deputy Foreign Minister Sergei Ryabkov, and the US delegation was headed by Billingslea. The consultations lasted about ten hours.
The previous round of the Russian-US strategic consultations was held in Vienna on 16 January before the dialogue was suspended due to the coronavirus pandemic. Moscow, which repeatedly accused Washington of being reluctant to extend the core treaty, has welcomed the resumption of contacts.