Hanssen-Baur, a Middle East expert, will meet President Mahinda Rajapakse, government representatives and officials from the Liberation Tigers of Tamil Ealam (LTTE).
He will also meet with other political leaders, the Norwegian statement said.
Norway's International Development Minister Erik Solheim, who earlier handled the island's peace process on a day-to-day basis, will make a brief visit to Colombo on Thursday April 6 for meetings.
Solheim is responsible for Norway's role as facilitator of the peace process.
Top Tamil Tiger peace negotiation Anton Balasingham is due to meet Solheim in London today to prepare the groundwork for next month's meeting between the Colombo government and the LTTE.
The statement comes as Sri Lanka's chief peace negotiator Nimal Siripala de Silva assured the government's commitment to go ahead with talks in Switzerland, despite Saturday