The Kazakh famine of 1930–1933, known in Kazakhstan as the Goloshchekin genocide (Kazakh: Goloshekındik genotsıd), also known as the Kazakh catastrophe, was a man-made famine where 1.5 million (possibly as many as 2.0–2.3 million) people died in Soviet Kazakhstan, of whom 1.3 million were ethnic Kazakhs; 38% of all Kazakhs died, the highest percentage of any ethnic group killed in the Soviet famines of the early 1930s.

It was the most severe of all regions affected by famine, percentage-wise, though more people died in the Ukrainian Holodomor, which began a year later. In addition to the Kazakh famine of 1919–1922, in 10–15 years Kazakhstan lost more than half of its population due to the actions of the Soviet power. Some historians assume that 42% of the entire Kazakh population died in the famine. The two Soviet censuses show that the number of the Kazakhs in Kazakhstan dropped from 3,637,612 in 1926 to 2,181,520 in 1937.

The famine made Kazakhs a minority in the Kazakh ASSR, and not until the 1990s did Kazakhs become the largest group in Kazakhstan again. Before the famine, around 60% of the republic's population were Kazakhs, but after the famine, only around 38% of the population were Kazakhs.

Some historians and scholars consider that this famine amounted to genocide of the Kazakhs.

Source:
https://en.wikipedia.org/wiki/Kazakh_famine_of_1932%E2%80%9333