I assume you are running the macro in Excel, in which case
Code:
Dim wd As Object
Dim oRng As Object
Dim oTable As Object
Dim wsRepCom As Worksheet
Set wsRepCom = ActiveSheet
On Error Resume Next
Set wd = GetObject(, "Word.Application")
On Error GoTo 0
wsRepCom.Range("Table3").Copy
Set oRng = wd.activedocument.Bookmarks("Table3").Range
oRng.PasteExcelTable False, False, True
Set oTable = oRng.Tables(1)
With oTable
.AutoFitBehavior 1
.Range.ParagraphFormat.SpaceAfter = 6
End With