The shooting of a presidential candidate threw Armenia’s election into disarray Friday, with the wounded victim saying he will call for a delay of the vote. Paruir Airikian, 63, was shot and wounded by an unidentified assailant outside his home in Yerevan, the Armenian capital, on Thursday just before midnight. Airikian said from the hospital after surgery Friday that he would initiate proceedings as allowed by the constitution to delay the vote for 15 days due to his condition, but not longer. He is one of eight candidates in the Feb. 18 race in this landlocked former Soviet republic and wasn’t expected to get more than 1 percent of the vote. But postponing the election could help opponents of President Serge Sarkisian, who was expected to easily win a second five-year term. Sarkisian said after visiting Airikian in the hospital that the perpetrators of the attack ‘‘obviously had an intention to influence the normal election process.’’