Katz had earlier sent a message to the Lebanese government that Lebanon must enforce the ceasefire agreement between Israel and Hezbollah, or Israel will continue to strike the country.
"Israel is France's friend", Macron told reporters, adding France could thus express disagreements over some of Israel's actions.
Lebanon faces a huge reconstruction bill following a year of Israeli strikes on the country.
Statements and speeches at the event have all indicated that Iran’s axis believes that the 'resistance' is not defeated.
Nasrallah was killed on September 27 in an Israeli airstrike as he met commanders in a bunker in Beirut's southern suburbs.
After the fall of the Assad regime in early December, Iran has been cut off from a land corridor to re-supply Hezbollah. As such, this funeral is one way they can still show support.
Hezbollah is testing their standing in new president Joseph Aoun's government.
Protestors claimed their goal was to secure the return of citizens stranded in Iran and block external influences on the Lebanese government.
Iran's ambassador to Beirut, Mojtaba Amani, told Iran's state television on Friday that Iran would allow the planes to land only if Iranian flights were allowed to travel to Beirut.
The official further said that Lebanese President Joseph Aoun has a "once-in-a-generation" opportunity to lead Lebanon away from Hezbollah and Iran's stranglehold.