Russia's Foreign Ministry has proposed suspending adoptions to American citizens until an accord is signed between the two countries that would allow authorities to better monitor the welfare of adopted Russian children in the U.S.

If the measure is enacted, it would not be the first time the Russian government has suspended adoptions to the United States.

The country reportedly put a temporary stop on adoptions to the U.S. in 2010 after a Tennessee woman put her 7-year-old son on a plane back to Russia for allegedly being violent. The boy, who was unaccompanied, arrived in his home country with a letter pinned inside his pocket.

"This child is mentally unstable," the adoptive mother, Torry Hansen. wrote to the Russian Ministry of Education. "He is violent and has severe psychopathic issues/behaviors. I was lied to and misled by the Russian orphanage workers and director regarding his mental stability and other issues."

Hansen faces a lawsuit for child support brought by her adoption agency.  The case is scheduled to go to trial in May.

Last November, Michael and Nanette Craver were convicted of involuntary manslaughter, endangering the welfare of a child and criminal conspiracy in the death of their adoptive son, Nathaniel, 7.

The couple was released based upon time served, igniting an uproar in Russia that landed them on the country's most wanted list, Russia Today reported.

U.S. citizens have adopted nearly 50,000 Russian children in the past two decades, according to the Associated Press.