Of 388 men who were wounded while serving in the 3rd Michigan, 335, or more than 86% of the total wounded, suffered gunshot wounds. Very few were wounded by cannon fire and there were no reports of men being wounded by bayonet although hand-to-hand combat did happen. Company I had the highest number of men wounded (48), while Company A had the lowest number (28).
- Fair Oaks, May 31, 1862 - 92
- Groveton (Second Bull Run), August 31, 1862 - 100
- Chancellorsville, May 5, 1863 - 41
- Gettysburg, July 1-3, 1863 - 22
- Mine Run, November 30, 1863 - 9
- Wilderness , May 6, 1864 - 62
- Spotsylvania, May 12, 1864 - 24
In the week of May 5-12, 1864, alone, the Old 3rd Michigan suffered 88 wounded (or nearly 23% of the total wounded).
- First man wounded was Henry Kampe of Company C, at Germantown, Virginia, on July 17, 1861, the day before the Regiment was engaged at Blackburn’s Ford, near Bull Run.
- Last man wounded in the regiment was Philo Wier of Company G on June 10, 1864; he subsequently died of his wounds on July 1
- Last man wounded in wartime was George D. Hill, while serving as a member of the 1st Michigan cavalry, on April 9, 1865
During the war 434 men were discharged and 40 officers resigned from the 3rd Michigan on account of a disability of one type or another. Another 65 men from the Old 3rd who had been consolidated into the 5th Michigan were discharged for disability. Altogether some 539 or more than 38% of the total enrolled were discharged for disability. At least 42 men suffered the loss of a limb.
Some of the more common disabilities reported were:
Asthma, bronchitis, consumption, deafness, dysentery, epilepsy, gunshot, heart disease, hemorrhoids, hernia, measles, pneumonia, rheumatic fever, rheumatism sunstroke, trauma or accident, typhoid fever, varicose veins and venereal disease