三周年结婚纪念日在英语中被称为"Third Wedding Anniversary"。
来源：三周年纪念日是指夫妻结婚三周年的纪念日。
英文例句：
"Happy Third Wedding Anniversary to my beautiful wife. Here's to many more years of happiness and love."
"Three years have gone by so quickly. I'm so grateful to have you by my side as we celebrate our Third Wedding Anniversary."
中文翻译：
"祝我美丽的妻子三周年结婚纪念日快乐。愿我们有更多幸福和爱的岁月。"
"三年时光飞逝。能和你一起庆祝我们的三周年结婚纪念日，我感到非常幸运。"