Tamberi loses wedding ring in Seine during opening ceremony
His country's male flag-bearer, the ring slipped off Tamberi's finger as he enthusiastically waved the Italian tricolour during the boat parade in the Parisian rain on Friday.
"I'm sorry, my love, I'm so sorry," the charismatic 32-year-old wrote on Instagram in a post dedicated to his wife, Chiara Bontempi Tamberi.
The high jumper blamed "too much water, too many kilos lost in the last few months or maybe the irrepressible enthusiasm of what we were doing. Probably all three".
Tamberi famously shared Olympic gold in Tokyo three years ago with Qatari friend and rival Mutaz Barshim.
The Italian has a reputation as something of a showman, including leaving one half of his face unshaved.