She should wait for four years and then observe the Iddah for four months and ten days (before she may remarry).
وَعَنْ عُمَرَ رضى الله عنه (
«فِي اِمْرَأَةِ اَلْمَفْقُودِ) تَرَبَّصُ أَرْبَعَ سِنِينَ، ثُمَّ تَعْتَدُّ أَرْبَعَةَ أَشْهُرٍ وَعَشْرًا»
She should wait for four years and then observe the Iddah for four months and ten days (before she may remarry).
ضعيف. رواه مالك في «الموطأ» (2 /575 /52)، من طريق سعيد بن المسيب، عن عمر، به وهو منقطع
Who passed it on, from Ibn Hajar back to the one who was there.
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