Poonia is expected to compete in a star-studded field, which will also include reigning Olympic champion Sandra Perkovic of Croatia.
The Indian had finished seventh in London Olympics with a throw of 63.62m while Perkovic had won gold in 69.11 m.
Poonia, though, is expected to move a place up to sixth after London silver medallist Darya Pishchalnikova was banned for 10 years yesterday by Russian Athletics Federation as she returned positive for anabolic steroid after her sample taken in May last year was re-tested.
"I am very happy that I am taking part in Diamond League as I will be competing against the best in the world. It will also give a perfect platform for my preparations for the Asian Championships and World Championships," she said.
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The Asian Championships will be held in India from July 3-7 though the host city is yet to be decided, while the World Championships will be held in Moscow in August. Poonia is yet to qualify for the World Championships.
The organisers pick athletes from among the entries submitted to them and each Diamond League Meeting attracts top athletes as each event offers a total prize money of USD 30,000.
The top-finisher in each event of a Diamond League Meeting collects USD 10,000, while second and third-finishers get USD 6,000 and USD 4,000. The fourth, fifth, sixth, seventh and eighth finishers get USD 3,000, 2,500, 2,000, 1,500 and 1,000 respectively.