Sub test()
Dim a, i, k
a = Cells(60000, 1).End(xlUp).Row
arr = Cells(1, 1).Resize(a)
For i = a To 1 Step -1
If arr(i, 1) = "" Then
k = k + 1
Else
If k <> 3 And k > 0 Then Cells(i + 1, 1).Resize(k).Delete Shift:=xlUp
k = 0
End If
Next i
End Sub
Sub test()
Dim a, i, k
a = Cells(60000, 1).End(xlUp).Row
arr = Cells(1, 1).Resize(a)
For i = a To 1 Step -1
If arr(i, 1) = "" Then
k = k + 1
Else
If k <> 3 And k > 0 Then Cells(i + 1, 1).Resize(k).Delete Shift:=xlUp
k = 0
End If
Next i
End Sub