diff --git a/subsys/bluetooth/controller/ll_sw/lll_sync.h b/subsys/bluetooth/controller/ll_sw/lll_sync.h
index 4ad8832a90a..20ca0781d6d 100644
--- a/subsys/bluetooth/controller/ll_sw/lll_sync.h
+++ b/subsys/bluetooth/controller/ll_sw/lll_sync.h
@@ -32,6 +32,14 @@ struct lll_sync {
 	uint8_t sca:3;
 #endif /* CONFIG_BT_CTLR_SYNC_ISO */
 
+#if defined(CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN)
+	/* Counter used by LLL abort of event when in unreserved time space to
+	 * provide near fair scheduling of overlapping multiple Periodic
+	 * Sync sets.
+	 */
+	uint8_t abort_count;
+#endif /* CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN */
+
 	uint16_t skip_prepare;
 	uint16_t skip_event;
 	uint16_t event_counter;
@@ -66,3 +74,4 @@ void lll_sync_prepare(void *param);
 enum sync_status lll_sync_cte_is_allowed(uint8_t cte_type_mask, uint8_t filter_policy,
 					 uint8_t rx_cte_time, uint8_t rx_cte_type);
 extern uint16_t ull_sync_lll_handle_get(struct lll_sync *lll);
+extern struct lll_sync *ull_sync_lll_is_valid_get(struct lll_sync *lll);
diff --git a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_sync.c b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_sync.c
index dcae61c8a5f..f1e43088e18 100644
--- a/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_sync.c
+++ b/subsys/bluetooth/controller/ll_sw/nordic/lll/lll_sync.c
@@ -467,21 +467,60 @@ static int is_abort_cb(void *next, void *curr, lll_prepare_cb_t *resume_cb)
 
 	/* Different radio event overlap */
 	if (next != curr) {
+		struct lll_scan_aux *lll_aux;
 		struct lll_scan *lll;
 
 		lll = ull_scan_lll_is_valid_get(next);
-		if (!lll) {
-			struct lll_scan_aux *lll_aux;
-
-			lll_aux = ull_scan_aux_lll_is_valid_get(next);
-			if (IS_ENABLED(CONFIG_BT_CTLR_SYNC_PERIODIC_SKIP_ON_SCAN_AUX) ||
-			    !lll_aux) {
-				/* Abort current event as next event is not a
-				 * scan and not a scan aux event.
-				 */
-				return -ECANCELED;
-			}
+		if (lll) {
+			/* Do not abort current periodic sync event as next
+			 * event is a scan event.
+			 */
+			return 0;
 		}
+
+		lll_aux = ull_scan_aux_lll_is_valid_get(next);
+		if (!IS_ENABLED(CONFIG_BT_CTLR_SYNC_PERIODIC_SKIP_ON_SCAN_AUX) &&
+		    lll_aux) {
+			/* Do not abort current periodic sync event as next
+			 * event is a scan aux event.
+			 */
+			return 0;
+		}
+
+#if defined(CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN)
+		struct lll_sync *lll_sync_next;
+		struct lll_sync *lll_sync_curr;
+
+		lll_sync_next = ull_sync_lll_is_valid_get(next);
+		if (!lll_sync_next) {
+			/* Abort current event as next event is not a
+			 * scan and not a scan aux event.
+			 */
+			return -ECANCELED;
+		}
+
+		lll_sync_curr = curr;
+		if (lll_sync_curr->abort_count < lll_sync_next->abort_count) {
+			if (lll_sync_curr->abort_count < UINT8_MAX) {
+				lll_sync_curr->abort_count++;
+			}
+
+			/* Abort current event as next event has higher abort
+			 * count.
+			 */
+			return -ECANCELED;
+		}
+
+		if (lll_sync_next->abort_count < UINT8_MAX) {
+			lll_sync_next->abort_count++;
+		}
+
+#else /* !CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN */
+		/* Abort current event as next event is not a
+		 * scan and not a scan aux event.
+		 */
+		return -ECANCELED;
+#endif /* !CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN */
 	}
 
 	/* Do not abort if current periodic sync event overlaps next interval
@@ -1012,6 +1051,14 @@ static void isr_rx_done_cleanup(struct lll_sync *lll, uint8_t crc_ok, bool sync_
 		/* Reset window widening, as anchor point sync-ed */
 		lll->window_widening_event_us = 0U;
 		lll->window_size_event_us = 0U;
+
+#if defined(CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN)
+		/* Reset LLL abort count as LLL event is gracefully done and
+		 * was not aborted by any other event when current event could
+		 * have been using unreserved time space.
+		 */
+		lll->abort_count = 0U;
+#endif /* CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN */
 	}
 
 	lll_isr_cleanup(lll);
diff --git a/subsys/bluetooth/controller/ll_sw/ull_sync.c b/subsys/bluetooth/controller/ll_sw/ull_sync.c
index 98197db94a1..e64754cd43b 100644
--- a/subsys/bluetooth/controller/ll_sw/ull_sync.c
+++ b/subsys/bluetooth/controller/ll_sw/ull_sync.c
@@ -253,6 +253,11 @@ uint8_t ll_sync_create(uint8_t options, uint8_t sid, uint8_t adv_addr_type,
 	ull_hdr_init(&sync->ull);
 	lll_hdr_init(lll_sync, sync);
 
+#if defined(CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN)
+	/* Initialise LLL abort count */
+	lll_sync->abort_count = 0U;
+#endif /* CONFIG_BT_CTLR_SCAN_AUX_SYNC_RESERVE_MIN */
+
 	/* Enable scanner to create sync */
 	scan->periodic.sync = sync;
 
@@ -529,6 +534,19 @@ struct ll_sync_set *ull_sync_is_valid_get(struct ll_sync_set *sync)
 	return sync;
 }
 
+struct lll_sync *ull_sync_lll_is_valid_get(struct lll_sync *lll)
+{
+	struct ll_sync_set *sync;
+
+	sync = HDR_LLL2ULL(lll);
+	sync = ull_sync_is_valid_get(sync);
+	if (sync) {
+		return &sync->lll;
+	}
+
+	return NULL;
+}
+
 uint16_t ull_sync_handle_get(struct ll_sync_set *sync)
 {
 	return mem_index_get(sync, ll_sync_pool, sizeof(struct ll_sync_set));