keep last 3 rows together

Hello all,

I want to keep last 3 rows together in a table so that it wont go to next page, If it want to go to next page then all the 3 rows must go, I am using grouping in my table. So like in below i want 2 , 3,4 ids to be on same page , If if want to go to next page then all of them must go .. The below is a table and i am using grouping in the table.

ID     Name

1       Tim

2       John

3      Martha

4      Tony