Is the tenth day of the third lunar month suitable for marriage?

You mean the tenth day of the third lunar month in 2023. Today is not suitable for marriage.

March 2023 10 is April 29, 2023 in Gregorian calendar. Today is suitable for worship, switching, transportation, elimination, plastic painting, cutting, burial, relocation, excavation, burial, taking off clothes, finishing clothes and so on. It is forbidden to get married, go to Liangshan, decorate indoors, disassemble and get on the horse today.

March 10, 2023 is also the anniversary of the victims of chemical warfare. Memorial Day for the Victims of Chemical War means that in order to mourn the victims of chemical war and enhance the international community's understanding of the dangers of chemical weapons, the Organization for the Prohibition of Chemical Weapons has decided to designate April 29th (the effective date of the Chemical Weapons Convention) as "Memorial Day for the Victims of Chemical War".