C. F. Keil and Franz Delitzsch on Jeremiah 3:3

Jer 3:3

But the idolatrous race was not to be brought to reflection or turned from its evil ways, even when judgment fell upon it. God chastised it by withholding the rain, by drought; cf. Jer 14:1., Amo 4:7. רביבים, rain-showers (Deu 32:2), does not stand for the early rain (יורה), but denotes any fall of rain; and the late rain (shortly before harvest) is mentioned along with it, as in Hos 6:3; Zec 10:1. But affliction made no impression. The people persisted in its sinful courses with unabashed effrontery; cf. Jer 5:3; Eze 3:7.