"The Kremlin wants to undermine Moldova's democratic institutions ahead of the October presidential election and the referendum on EU membership," the document said.
The text notes that Russia intends to provoke protests in Moldova if the pro-Russian candidate does not win, while seeking to create a negative opinion in Moldovan society about Western governments and the country's current leadership.
Officials say Russia seeks to "increase tensions in society, stir up negative attitudes toward the West and the incumbent Maya Sandu team" by using disinformation and Internet propaganda.
"Russia's political interference in Moldovan affairs in the run-up to the October elections began years ago. For example, employees of RT, a Russian state-funded media outlet, have been providing direct support to fugitive Moldovan citizen Ilan Shor with the consent of the Russian authorities for several years."
Earlier, international sanctions were imposed against Shor for his destabilizing electoral activities.
The text says that the authorities of the three countries will seek to bring to justice those involved in the Kremlin's hidden schemes to finance political activities in Moldova.
"We make it clear to Moscow that we are in favor of free and fair elections and will not tolerate its attempts to interfere in and undermine democratic processes," the statement said.