He dubbed the situation "the ongoing escalation".
"Parliament must be convened immediately to discuss the dangers that the ongoing escalation poses to Europe and the world," Roussel said in a statement on Monday.
As diplomatic efforts to find a peaceful solution to the Ukraine crisis resume, the "hawkish" bloc of the US, the UK, Poland, the Baltic states, and France is doing all it can to prevent them from succeeding, the lawmaker added.
"It is shameful that the French government is slavishly following this process," the statement said.
Roussel also warned of the possible consequences of such actions, saying that Russia has declared that allowing Kiev to use Western-supplied munitions for strikes deep into Russia would be tantamount to direct NATO involvement in the conflict.
"This is not only a further escalation, but a perceived risk of the conflict spilling over onto European soil... France must break with this policy, declare that French weapons cannot be used to attack Russian territory, and refuse to send the Mirage [fighter jets]. The conditions of military aid must be reconsidered and subordinated to the development of a concrete and urgent political solution," the statement read.
On Sunday, The New York Times reported, citing unnamed representatives of the US administration, that US president Joe Biden had for the first time authorized Ukraine to use US long-range missiles to strike Russian territory. According to the sources, the first strikes deep into Russian territory will most likely be carried out with ATACS missiles.
Kremlin spokesman Dmitry Peskov said the permission to strike deep into Russia, if it was accepted and communicated to Ukraine, means a new round of tensions. He also recalled that Russian President Vladimir Putin clearly formulated Moscow's position regarding decisions on strikes with long-range weapons on the territory of Russia.
Putin said in September that NATO countries were not only discussing the possible use of Western long-range weapons by Kiev but were essentially deciding whether to become directly involved in the Ukraine conflict. Direct involvement of Western countries in the conflict will change its nature, and Russia will be forced to make decisions based on the threats to it, Putin added.