Drought stress affects chickpea plants in different ways. The study looked at three chickpea varieties to see how they responded to drought. They found that drought stress reduced chlorophyll levels and affected photosynthesis and yield. The variety 'ILC482' had higher proline levels than 'Pirouz' under both normal and drought conditions. The drought-tolerant variety 'Bivaniej' had the highest yield, while the drought-sensitive 'Pirouz' had the lowest yield. Drought during the flowering stage had a bigger impact on seed yield than drought during the vegetative stage.