With accent marks:
У семи́ ня́нек дитя́ без гла́зу.
~ Seven babysitters make the kid to lose an eye.
The more people take on one task, the less attention is paid to the task.
The closest English equivalent: too many cooks spoil the broth.
Other Russian proverbs
Crowded, but not aggrieved.
What goes around comes around.
Free cheese is only in a mousetrap.
Everything has its time.
Better late than never.
Your own shirt is closer to your body.
The beauty of a debt is its payment
You can't hide an awl in a bag.