Foreign marriage is totally different to Indian marriage. The reason that re-entry to the U.S. is difficult for an immigrant is that when an immigrant marries a U.S. citizen and other foreign person, Because of this and due to potentially longer processing times with immigrant visas.
Many times, couples prefer to legally marry in the U.S. but then have a renewal of vows or another ceremony (often called a religious ceremony) for friends and family abroad, so they can start the immigration process for the immigrant spouse as soon as possible while the immigrant spouse is in the U.S and other foreign country. The last option that may affect whether a U.S. citizen marries his or her immigrant spouse inside or outside of the U.S. is the possibility that the couple can apply directly at the U.S. consulate in he immigrant spouse’s home country for an immigrant visa (which leads to a green card), thus bypassing the CIS process in the U.S.. In foreign mostly people will done love marriage only, because it is normal to foreigners. Foreign marriage  feels like one through and through, not really breaking any new ground. Love at first sight, sex ensues, bottom gets into trouble, gets saved, more sex, etc.