On Friday, Prime Minister Dmitry Medvedev said Russia would regard any US move to curb the activities of its banks as a "declaration of economic war" and would take retaliatory action.
Washington said on Wednesday it would impose fresh sanctions by the end of August after it determined that Moscow had used a nerve agent against a former Russian agent and his daughter in Britain, sending Russia's rouble currency to a two-year low, Reuters wrote.
Speaking on a weekly TV talk show, Siluanov said the new US sanctions, some of which could restrict purchases of Russian government bonds, were "unpleasant but not fatal".
"We have lowered to the minimum level and will further decrease our investment in the US economy, in the US securities," Siluanov said, shedding light on the nature of an unexpected drop in Russia's holdings of US Treasury bonds.
Russia has ditched its holdings of US Treasuries in the past few months as relations between Moscow and Washington have deteriorated, data showed last month.
Russia will also have more settlement in roubles and other currencies, such as the euro, than in dollars, Siluanov said.
"Eventually, this will negatively impact US investors. But we are not planning now any limitations such as shutting down McDonalds," Siluanov said. He referred to calls by some lawmakers to shut down prominent US companies in Russia starting from 2014, when relations with the West soured over Crimea’s reunion with Russia and the crisis in Ukraine.
"Our citizens work in these companies, these companies pay taxes into the budget of our country," Siluanov said.
While admitting that US sanctions would boost inflation in Russia as they hurt the ruble, Siluanov said there were no plans to ban using the dollar in Russia.
"Of course, the government has no such plans. That would be a step to an impasse."