Por favor, tente o código de amostra abaixo ..
Sub test()
'change the sheet name and range name as yours
Set Rng = Sheets("Sheet1").Range("A1:A10")
Set Rng1 = Sheets("Sheet2").Range("A1:A10")
i = 1
j = 0
For Each cell In Rng
Sheets("Sheet3").Range("A" & i).Value = cell.Value
Sheets("Sheet3").Range("A" & i).Offset(0, 1).Value = cell.Offset(0, 1).Value
Sheets("Sheet3").Range("A" & i).Offset(0, 2).Value = cell.Offset(0, 2).Value
i = i + 1
Next cell
j = i
For Each cel In Rng1
Sheets("Sheet3").Range("A" & j).Value = cel.Value
Sheets("Sheet3").Range("A" & j).Offset(0, 1).Value = cel.Offset(0, 1).Value
Sheets("Sheet3").Range("A" & j).Offset(0, 2).Value = cel.Offset(0, 2).Value
j = j + 1
Next cel
End Sub
Espero que isso ajude você