In a May 14 interview with Bloomberg TV, Lavrov, also said "a real war" was going on in eastern and southern Ukraine, making it difficult to hold a free and fair presidential election later this month.
Lavrov said that for a national dialogue to succeed, "it is absolutely necessary to ensure equal participation of all regions of Ukraine."
Armed separatists in eastern Ukraine are not included in roundtable talks beginning on May 14 in Kyiv.
Lavrov also said that Russia has "no intention" of sending its troops anywhere.
Ukraine's pro-Western government and its allies accuse Russia -- which annexed Crimea in March -- of stoking unrest in the east of the country and massing troops on the border.
Amazing advertisement for Darth Vader's Odessa mayoral campaign. "Law man. Politician. Father." pic.twitter.com/OH4erqRyUl
— Kevin Rothrock (@KevinRothrock) May 14, 2014
'Donetsk People's Republic' men blockading military unit in Donetsk http://t.co/7V5N6iKncP
— Kyiv Post (@KyivPost) May 14, 2014
The London-based EBRD is holding its annual meeting in Warsaw.
It says Ukraine's economy will shrink by 7 percent in 2014, shredding its previous 2014 growth estimate of 1.5 percent.
Meanwhile, the EBRD said Russia is set to post zero economic growth this year, before expanding by just 0.6 percent in 2015.
The EBRD was founded to help ex-Soviet bloc countries make the transition to free-market economies and democracy.
On May 12, the Ukrainian government signed a pledge to fight corruption.
The EBRD said "combatting corruption in Ukraine has become increasingly urgent because of the impact it is having on the willingness of companies to invest in the country."
Last night my phone provider sent me an automated message: 'Welcome to Russia'. I'm still in Slaviansk... pic.twitter.com/LejwVAFgql
— Alessandra Prentice (@alessaprentice) May 13, 2014
Seems like that is indeed a "repatriated" Ukrainian military helicopter with UN insignia on it. Big misuse of UN logo http://t.co/mvZSiLZu2E
— Mark MacKinnon (@markmackinnon) May 14, 2014
Santa from hell. Children of Donetsk Republic, your leader Pavel Gubarev has toys for you. http://t.co/9qXf0UU7P8 pic.twitter.com/mRjTfWVvr1
— Leonid Ragozin (@leonidragozin) May 14, 2014
Gatilov: Moscow demands illegitimate use of helicopters with UN emblems by Ukrainian military be probed http://t.co/iwZe3fLYjz
— Kyiv Post (@KyivPost) May 14, 2014
Video Russian media focusing on doesn't really prove much. Yes, there's a helicopter with UN colours. But where? And whose soldiers?
— Mark MacKinnon (@markmackinnon) May 14, 2014
Ukraine # 1 Greetings. roundtable in Kyiv "national dialogue." Important consensus and soglasie.Nadeyus, the next round will be in the East.
- Štefan Füle (@ StefanFuleEU) May 14, 2014
Foto from US State dept shows that Russians haven't moved from border. pic.twitter.com/OCnOrECWu4
— bruce springnote (@BSpringnote) May 14, 2014