不,没有SP3.
你是对的,Windows 2003没有SP3.这是TechNet的一篇博文,解释了这一点：
(重点补充.)
We have received inquiries from our
customers and partners on whether or
not there will be a need for a Service
Pack 3 for Windows Server 2003.
Microsoft will not have a SP3 release
for Windows Server 2003.
>来源：TechNet博客,Microsoft Windows Server团队,2009-09-15,Support changes coming July 2010 for Windows 2000 Server and Windows Server 2003
>相关：维基百科：https://en.wikipedia.org/wiki/Windows_Server_2003#Updates