祸不单行 (huò bù dān xíng): Bad things tend to happen together or in quick succession. — Meaning & Stroke Order

First his wallet was stolen, then he fell down—truly misfortunes never come singly.

Recently the company has been losing money, and the boss got sick—truly misfortunes never come singly.

The stock market crashed, and then his house caught fire—truly misfortunes never come singly.

He did poorly on the exam, and then his girlfriend broke up with him—he lamented that misfortunes never come singly.