He spoke following a report by Russia's Izvestia newspaper claiming that Ryabkov's meeting set for Monday, July 17, would be canceled if Washington failed to return Russian diplomatic compounds in Maryland and NY.
"The seized compounds have not been returned yet", Ms. Zakharova said, as translated by TASS, a state-owned newswire.
Zakharova said the United State had refused to issue visas to candidates submitted to replace the 35 expelled diplomats, leaving an imbalance in the two countries' respective representations.
"The staff of the U.S. Embassy in Moscow far exceeds the number of our embassy workers in Washington", she said.
The U.S. intelligence community has concluded that Russian state-sponsored hackers and propagandists interfered in last year's White House race by targeting Mr. Trump's former Democratic rival, Hillary Clinton.More news: 'Walking Dead' Season 8 teaser photo shows a tense reunion
The outgoing Obama administration expelled 35 suspected Russian spies late previous year and seized two diplomatic compounds over what it said was the hacking of US political groups during the 2016 presidential election.
She confirmed that the issue is expected to be discussed during the upcoming meeting between Russian Deputy Foreign Minister Sergey Ryabkov and US Under Secretary of State for Political Affairs Thomas Shannon, which is scheduled to take place in Washington DC next Monday, July 17.
"At the same time, we have pointed out repeatedly that the situation both with diplomats and the property continues to be unacceptable". "Simply put, the Russian government has done nothing to deserve renewed access to these compounds".
Kremlin spokesman Dmitry Peskov refused to comment on whether the situation with Russia's diplomatic property in the United States had been discussed during Russian President Vladimir Putin and his USA counterpart Donald Trump's meeting in Hamburg.