Cutting State of Origin ties is proving difficult for Queensland's Johnathan Thurston.

And captain Cameron Smith believes the Maroons will only make it harder for his veteran playmaker by sealing a 3-0 Origin whitewash in Sydney on Wednesday night.

Thurston, 33, is having second thoughts about retiring from representative football following the 2017 World Cup after Queensland clinched a 10th series win in 11 years.

Smith did not sound surprised, saying he believed Thurston made an Origin call amid the delirious scenes that followed his NRL club North Queensland's maiden premiership win last year.