Montenegro, Albania, Iceland, Liechtenstein, Norway and Ukraine joined the Western anti-Russia sanction regime on Thursday.
"Well, of course they can. And we reiterate, that, naturally, the principle of reciprocity is fundamental," Peskov told journalists when asked whether retaliatory measures would be implemented against countries that joined the anti-Russia sanctions.
Russia’s official diplomatic relations with the West have deteriorated amid the Ukrainian crisis.
The United States, the European Union and their allies imposed several rounds of economic, financial and technological sanctions on Russia over alleged meddling in Ukraine’s internal affairs. Russia has repeatedly denied the assertions, and has responded to the sanctions with a food import ban.
Moscow has repeatedly stressed that it would reply to all restrictions with reciprocity.