Misbah, who turns 39 next month, has been leading Pakistan after reviving his career in the aftermath of the spot-fixing saga of 2010, which saw then-captain Salman Butt, Mohammad Asif and Mohammad Aamer banned and jailed.
"It was a good two-year offer with an extension of another year from Worcestershire but since the contract required me to skip the national duties I turned it down," Misbah told AFP.
Misbah also took charge of the one-day and Twenty20 teams in 2011 following the removal of Shahid Afridi who developed differences with the then set-up of the Pakistan Cricket Board.
He was replaced by Mohammad Hafeez as Twenty20 captain in May last year.
Misbah said although playing county cricket would have been a good experience, he preferred national duty.
"It gives a cricketer a good experience of English conditions but I think as the captain of the team I have a lot of responsibility and leading the team is my first priority," he said.
Pakistan will feature in the eight-nation Champions Trophy in England in June where they are placed in Group B along with arch-rivals India, South Africa and the West Indies.
Defending champions Australia, England, Sri Lanka and New Zealand form group A.
COMMENTS (6)
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Stupid thing to do......Misbah is getting emotional here. Association with any entity or country does not pay for bills.
One should always hop on opportunity, when he/she gets a chance. I believe this is Misbah's mistake.
@Ch. Allah Daad: yes, your comment makes a lot of sense! Hats off!!
Please Misbah join County and give chance to new players. Younis Khan is also going for champion trophy. Lets see........
Misbah for President this September!!!
English county tried to help us get rid of him otherwise who wants 39 years old in tough county conditions.