But the 33-year-old insisted no decision has yet been made.
"Myself and Eddie O'Sullivan had discussed my future plans back in November and prior to the start of the championship. We agreed that we would talk again after the tournament," said Humphreys.
"Any decision will not be made until after theÂ Six Nations."
Humphreys has been an unused replacement for Ireland's win over Italy and the defeat in Paris last weekend.