Harshavarman III

{{Infobox royalty

| name = Harshavarman III

| title = King of Cambodia

| reign = 1066–1080

| predecessor = Udayadityavarman II

| successor = Jayavarman VI

| full name = Narapatindravarman

| father = Yasovarman I

| mother =

| issue = Sri Jayarajacudamani

| death_date = 1080

| posthumous name = Sadaśivapada

| religion = Hinduism

}}

Harshavarman III ({{langx|km|ហស៌វរ្ម័នទី៣}}) was a king of Khmer who ruled from 1066 to about 1080 AD.{{cite web|last1=W.|first1=Aphisit|title=Angkor Era - Part II (1001 - 1181 A.D)|url=http://www.cambodia-travel.com/khmer/angkor-era1181.htm|website=cambodia-travel|publisher=Cambodia Tours|access-date=18 June 2015|archive-date=3 December 2012|archive-url=https://web.archive.org/web/20121203045409/http://www.cambodia-travel.com/khmer/angkor-era1181.htm|url-status=dead}} He succeeded his elder brother Udayadityavarman II{{cite book|last= Coedès|first= George|author-link= George Coedès|editor= Walter F. Vella|others= trans.Susan Brown Cowing|title= The Indianized States of Southeast Asia|year= 1968|publisher= University of Hawaii Press|isbn= 978-0-8248-0368-1}}{{rp|139}}Higham, C., 2014, Early Mainland Southeast Asia, Bangkok: River Books Co., Ltd., {{ISBN|9786167339443}}{{rp|376}} and his capital was the so-called Second Yasodharapura, which had its center in Baphuon, built by his brother, and West Baray as its principal bàrày. He was married to queen Kambujarajalakshmi.

His reign was upset by internal rebellions that finally he was not able to battle out. So Harshavarman III was the last ruler of his dynasty. His successor, Jayavarman VI, was an usurper who came from Phimai area, on the Khorat Plateau, in present-day Thailand.Higham, 2003, pp.107 ff Harshavarman received the posthumous name of Sadaśivapada.{{rp|152}}

He was named in stele K.908{{cite web|last1=W.|first1=Aphisit|title=Angkor Era - Part I (834 - 1000 A.D)|url=http://www.cambodia-travel.com/khmer/angkor-era1000.htm|website=cambodia-travel|publisher=Cambodia Tours|access-date=18 June 2015|archive-date=11 September 2019|archive-url=https://web.archive.org/web/20190911083550/http://www.cambodia-travel.com/khmer/angkor-era1000.htm|url-status=dead}} at Preah Khan as a maternal ancestor of Jayavarman VII, even if a long dispute rose out of this issue.{{cite web|first=Sunday|last=John|title=Preah Khan Conservation Project - Report VII Appendix A|url=http://www.wmf.org/sites/default/files/wmf_publication/Preah_Khan_Conservation_Project_Report_VII_Appendix_A.pdf|publisher=World Monuments Fund|location=New York, USA|pages=27–28|format=PDF|date=April 11, 1997|access-date=2009-08-17|display-authors=etal|url-status=dead|archive-url=https://web.archive.org/web/20110516175823/http://www.wmf.org/sites/default/files/wmf_publication/Preah_Khan_Conservation_Project_Report_VII_Appendix_A.pdf|archive-date=May 16, 2011}}

Between 1074 and 1080, the kingdom had to undergo the invasion by the Champa Prince Pang, a younger brother of the Champa king Harivarman IV, and himself the future king Paramabodhisattva. Sambhupra temples were destroyed and the inhabitants were taken into slavery to My Son, including the prince Sri Nandavarmadeva.{{rp|152}}Maspero, G., 2002, The Champa Kingdom, Bangkok: White Lotus Co., Ltd., {{ISBN|9747534991}}{{rp|72}}

In 1076, Cambodia and Champa were driven by the Song Chinese in an attack against the Tonkin. The defeat of the Chinese army from Đại Việt brought before the retirement of its allies.{{rp|152}}