According to Turkish Consul Asiye Nurcan Ipekci, the attack happened at 2:51 a.m. local time (00:51 GMT).
No one was hurt and no damage was caused to the building. Ipekci said she did not have any further details about the arrested individuals.
Swiss police said Monday that two incendiary devices were thrown at the Turkish consulate general in Zurich and that three men were arrested.
Zurich police say officers patrolling the area noticed the incident, in which a hedge outside the building caught fire, shortly before 3 a.m. Monday.
They were able to extinguish the blaze immediately. They arrested three males aged 17, 18 and 19 who tried to flee the scene when they saw police arrive. Police appealed for witnesses who may have noticed any suspicious activity to come forward.
The incident is not the first attack on the Turkish consulate general in Zurich. In January 2018, a car at the consulate was targetted in an arson attempt in an early morning attack.
On May 1, 2017, hundreds of masked people attacked the consulate building. The attackers painted "Kill Erdoğan" on the walls of a nearby building and bus stop, targeting President Recep Tayyip Erdoğan.
In January 2017, a late night bombing attack carried out with fireworks and other explosives damaged walls and windows of the consulate building in Zurich.