The 30-year-old has been agonising over the decision after pulling out of the marathon on Sunday, despite being the world record holder in the event.
"I desperately want to redeem something but I'm not going to put myself in the arena if I'm not right," she said.
Paula is on the entry list for the race but that doesn't mean she will run.
The Team GB athletics manager said: "It's now up to her whether she runs, but she does have the opportunity to pull out at any time before the race.
"Paula trained twice yesterday and she'll know better than me what kind of state she is in."
Numb
Paula dropped out of Sunday's marathon with four miles to go.
"I was struggling to stay on the road and I felt numb," she said.
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