Speaking on Monday, Russian Foreign Minister Sergey Lavrov criticized the military offensive launched on February 28, stating that Washington had believed it could subdue Tehran swiftly through "unprovoked aggression."
"I believe these people now understand how mistaken they were, how misguided they were," Lavrov said.
The Russian foreign minister also expressed Moscow's readiness to act as a mediator to help resolve the ongoing crisis, should the need arise.
The US and Israel started a fresh round of aerial aggression on Iran on February 28, some eight months after they carried out unprovoked attacks on the country.
The attacks led to the martyrdom of Leader of the Islamic Revolution Ayatollah Seyyed Ali Khamenei.
In response, Iran launched retaliatory missile and drone barrages targeting both Israeli-occupied territories and US military installations in regional countries.