Pakistan beat England by seven wickets in the second one-day international at Lord's on Saturday.
The touring team lead the five-match series 1-0. The first game was abandoned due to rain.
Earlier, Pakistan captain Inzamam-ul-Haq won the toss and elected to bowl first. England made one change from Wednesday's first match, which was abandoned due to rain at Sofia Gardens in Cardiff, bringing in swing bowler Jon Lewis for Sajid Mahmood.
Pakistan named an unchanged team.
Rain was interfering with the start of the match as consistent drizzle ensured the 0915 GMT start was delayed by an hour as ground-staff mopped up the excess water on the covers over the pitch.
England hasn't won a limited-overs match against a major rival in its last eight outings. It lost a Twenty20 match to Pakistan, was beaten 5-0 by Sri Lanka earlier in the season in the 50-over format, and was defeated in the final game of a 5-1 series loss to India in March and April.
England: Marcus Trescothick, Ian Bell, Kevin Pietersen, Andrew Strauss (captain), Paul Collingwood, Jamie Dalrymple, Rikki Clarke, Chris Read, Jon Lewis, Darren Gough, Stuart Broad.
Pakistan: Mohammed Hafeez, Shoaib Malik, Younis Khan, Mohammad Yousuf, Inzamam-ul-Haq (captain), Abdul Razzaq, Shahid Afridi, Kamran Akmal, Rana Naved-ul-Hasan, Shoaib Akhtar, Mohammad Asif.