0120 GMT February 19, 2020
He made the remarks after a newspaper commented on the country's role in Lebanon, IRNA reported.
Qassemi rejected the claims, saying the Islamic Republic has always thrown its weight behind lasting stability and security in Lebanon.
He added that the newspaper's claims run counter to Iran's stance and its approach of pursuing understanding in Lebanon over the past four decades.
Iran believes that peaceful coexistence among followers of divine religions and ethnicities in Lebanon has turned the country into a model for other states, Qassemi said.
The Iranian spokesperson stressed the importance of strengthening national solidarity in Lebanon, saying, "The Islamic Republic of Iran has always taken steps in this regard."
Respect for national sovereignty of all countries, including Lebanon, is the most important principle in Iran's foreign policy, he pointed out.
In a phone conversation with Lebanese President Michel Aoun in November, Iranian President Hassan Rouhani said the Islamic Republic would always stand by Lebanon and spare no effort to help improve the country’s stability.
Rouhani said Tehran and Beirut had a “very friendly and growing” relationship, adding, “The Islamic Republic of Iran has always called for the safeguarding of peace and stability in regional countries, including Lebanon.”