Dozens of protesters have so far been detained and charged by the police, and several dozen others have been wounded in clashes with security forces.
In the Armenian capital Yerevan protests against the appointment of Serzh Sargsyan to the post of Prime Minister.
Addressing the protesters, Pashinyan said he had to leave for 1.5 hours to conduct a consultation with organizers of the protest campaign Armen Grigoryan and David Sanasaryan ahead of today's big assembly in downtown Yerevan.More news: Prime minister says sorry for treatment of Commonwealth immigrants
A day earlier, police used tear gas and stun grenades when protesters tried to break through police cordons. Protesters were holding Armenian flags and were chanting "Armenia without Serzh!" However, following a 2015 constitutional referendum the country shifted from a presidential system to a parliamentary republic - relegating the presidency to a more ceremonial role.
"We are watching the events that are unfolding in Armenia and - most importantly - hoping that everything will be within the legal framework", said Putin's spokesman Dmitry Peskov. The ex-president had formally stated he would "not aspire" for the prime minister position.
Protesters see the government change as an attempt to extend Sargsyan's rule in the former Soviet nation. BBC reports in its article Armenia parliament swears in new PM despite protests that opposition MP Nikol Pashinyan said the protests constitute a "non-violent velvet revolution".More news: Canelo Alvarez to serve six-month suspension for failed drug tests
Political analysts said it was too early to call the protests the start of a revolution but warned that the authorities could lose control of the situation.
The European Union is closely following ongoing developments in Yerevan and other cities.More news: Are Analysts Bullish Barclays PLC (LON:BARC) After Last Week?